MOMENTUM by Lizelle Swanepoel https://padlet.com/lizellexs/kdmwa7kmmfar en-us 2018-09-04 15:29:00 UTC 2026-05-11 16:45:41 UTC hello@padlet.com https://padlet.net/icons/png/26bd.png DEFINITION: Momentum is the product of mass and velocity of an object. lizellexs https://padlet.com/lizellexs/kdmwa7kmmfar/wish/277609757 Momentum = The product of the mass and velocity of an object.]]> 2018-09-04 15:32:41 UTC https://padlet.com/lizellexs/kdmwa7kmmfar/wish/277609757 FORMULA lizellexs https://padlet.com/lizellexs/kdmwa7kmmfar/wish/277610312 p ∝ m
p ∝ v
p = mv

UNITS:
m = kg
v = m.s-1
p = kg.m.s-1
]]> 2018-09-04 15:33:38 UTC https://padlet.com/lizellexs/kdmwa7kmmfar/wish/277610312 NET FORCE ACTING ON A BODY CHANGES THE MOMENTUM OF THAT BODY lizellexs https://padlet.com/lizellexs/kdmwa7kmmfar/wish/277613126 Fnet.Δt  =  Δp
              =  m.Δv
              =  m (vf  -  vi)]]> 2018-09-04 15:38:24 UTC https://padlet.com/lizellexs/kdmwa7kmmfar/wish/277613126 CHANGE IN MOMENTUM lizellexs https://padlet.com/lizellexs/kdmwa7kmmfar/wish/277613750 Δp = pf - pi
      = mvf  -  mvi
      = m (vf - vi)]]> 2018-09-04 15:39:27 UTC https://padlet.com/lizellexs/kdmwa7kmmfar/wish/277613750 CALCULATING CHANGE IN MOMENTUM lizellexs https://padlet.com/lizellexs/kdmwa7kmmfar/wish/277615780 EXAMPLE 1
A 5 kg mass has its velocity changed from 8 m/s east to 2 m/s east.  Find the object’s change in momentum.

m = 5.0 kg
Vi = 8.0 m/s East
Vf = 2.0 m/s East
Δp = ?]]> 2018-09-04 15:42:31 UTC https://padlet.com/lizellexs/kdmwa7kmmfar/wish/277615780 Solution: lizellexs https://padlet.com/lizellexs/kdmwa7kmmfar/wish/277616166 Δp = mΔV
      = (5)(2 - 8)
      = -30 kg.m.s-1 East
]]> 2018-09-04 15:43:07 UTC https://padlet.com/lizellexs/kdmwa7kmmfar/wish/277616166 Example 2: lizellexs https://padlet.com/lizellexs/kdmwa7kmmfar/wish/277619648 A tennis ball (mass 57 g) travels horizontally towards a wall, and strikes it at 20m/s. It rebounds horizontally at 30 m/s away from the wall.
Calculate the change in momentum of the tennis ball.
CHOOSE A +ve DIRECTION FIRST!]]> 2018-09-04 15:49:34 UTC https://padlet.com/lizellexs/kdmwa7kmmfar/wish/277619648 Solution: lizellexs https://padlet.com/lizellexs/kdmwa7kmmfar/wish/277622258 Δp = mΔV
      =  m(vf - vi)
      = (0,057)[-30 - (+20)]
      = - 2,85 kg.m.s-1
      = 2,85 kg.m.s-1 away from the wall
]]> 2018-09-04 15:53:35 UTC https://padlet.com/lizellexs/kdmwa7kmmfar/wish/277622258 Checkpoint lizellexs https://padlet.com/lizellexs/kdmwa7kmmfar/wish/277624143 2018-09-04 15:57:15 UTC https://padlet.com/lizellexs/kdmwa7kmmfar/wish/277624143 EXERCISE 2 lizellexs https://padlet.com/lizellexs/kdmwa7kmmfar/wish/278731209 2018-09-07 06:13:11 UTC https://padlet.com/lizellexs/kdmwa7kmmfar/wish/278731209 MEMO (p 25-30) lizellexs https://padlet.com/lizellexs/kdmwa7kmmfar/wish/279294921 2018-09-10 08:07:58 UTC https://padlet.com/lizellexs/kdmwa7kmmfar/wish/279294921 Experiment 1 - Impulse lizellexs https://padlet.com/lizellexs/kdmwa7kmmfar/wish/281912005 2018-09-16 12:15:36 UTC https://padlet.com/lizellexs/kdmwa7kmmfar/wish/281912005 Experiment 1 - continued lizellexs https://padlet.com/lizellexs/kdmwa7kmmfar/wish/281912068 2018-09-16 12:16:09 UTC https://padlet.com/lizellexs/kdmwa7kmmfar/wish/281912068 Experiment 2 - Elastic vs. inelastic collision lizellexs https://padlet.com/lizellexs/kdmwa7kmmfar/wish/281912279 2018-09-16 12:17:34 UTC https://padlet.com/lizellexs/kdmwa7kmmfar/wish/281912279 lizellexs https://padlet.com/lizellexs/kdmwa7kmmfar/wish/284475531 2018-09-21 17:04:08 UTC https://padlet.com/lizellexs/kdmwa7kmmfar/wish/284475531 FACTORS THAT AFFECT MOMENTUM lizellexs https://padlet.com/lizellexs/kdmwa7kmmfar/wish/370422352 2019-07-07 14:06:32 UTC https://padlet.com/lizellexs/kdmwa7kmmfar/wish/370422352 MOMENTUM AND IMPULSE lizellexs https://padlet.com/lizellexs/kdmwa7kmmfar/wish/370426855 2019-07-07 15:13:37 UTC https://padlet.com/lizellexs/kdmwa7kmmfar/wish/370426855 LINEAR MOMENTUM - ALWAYS CONSERVED lizellexs https://padlet.com/lizellexs/kdmwa7kmmfar/wish/383104950 Comparing momentum before and after a collision.]]> 2019-09-12 07:30:13 UTC https://padlet.com/lizellexs/kdmwa7kmmfar/wish/383104950 MEMO (P 34-49) lizellexs https://padlet.com/lizellexs/kdmwa7kmmfar/wish/383115813 2019-09-12 08:10:19 UTC https://padlet.com/lizellexs/kdmwa7kmmfar/wish/383115813 What you need to know: lizellexs https://padlet.com/lizellexs/kdmwa7kmmfar/wish/384304461 SYLLABUS]]> 2019-09-15 15:20:37 UTC https://padlet.com/lizellexs/kdmwa7kmmfar/wish/384304461 Elastic vs. inelastic collisions lizellexs https://padlet.com/lizellexs/kdmwa7kmmfar/wish/384305330 2019-09-15 15:25:26 UTC https://padlet.com/lizellexs/kdmwa7kmmfar/wish/384305330 lizellexs https://padlet.com/lizellexs/kdmwa7kmmfar/wish/384305769 2019-09-15 15:27:45 UTC https://padlet.com/lizellexs/kdmwa7kmmfar/wish/384305769 Solution lizellexs https://padlet.com/lizellexs/kdmwa7kmmfar/wish/612984613 2020-06-05 13:38:25 UTC https://padlet.com/lizellexs/kdmwa7kmmfar/wish/612984613 FORCE-TIME GRAPH lizellexs https://padlet.com/lizellexs/kdmwa7kmmfar/wish/613087891 2020-06-05 14:28:33 UTC https://padlet.com/lizellexs/kdmwa7kmmfar/wish/613087891 COLLISIONS AND CHANGE IN MOMENTUM lizellexs https://padlet.com/lizellexs/kdmwa7kmmfar/wish/616638530 Car safety:
  • This takes a look at how air bags and crumple zones in cars decrease the net force acting on passengers in a collision.
]]> 2020-06-08 11:17:30 UTC https://padlet.com/lizellexs/kdmwa7kmmfar/wish/616638530 lizellexs https://padlet.com/lizellexs/kdmwa7kmmfar/wish/616651027 2020-06-08 11:26:29 UTC https://padlet.com/lizellexs/kdmwa7kmmfar/wish/616651027 lizellexs https://padlet.com/lizellexs/kdmwa7kmmfar/wish/616653990 2020-06-08 11:28:40 UTC https://padlet.com/lizellexs/kdmwa7kmmfar/wish/616653990 NEWTON 2nd LAW APPLICATION IN MOMENTUM CALCULATIONS lizellexs https://padlet.com/lizellexs/kdmwa7kmmfar/wish/616658942 2020-06-08 11:32:18 UTC https://padlet.com/lizellexs/kdmwa7kmmfar/wish/616658942 NEWTON 2nd LAW IN TERMS OF MOMENTUM lizellexs https://padlet.com/lizellexs/kdmwa7kmmfar/wish/616665115 State Newton's second law in terms of momentum:
The net force acting on an object is equal to the rate of change of momentum.

(There are two acceptable statements of Newton's Second Law)]]> 2020-06-08 11:36:49 UTC https://padlet.com/lizellexs/kdmwa7kmmfar/wish/616665115 WILL THE MOMENTUM OF AN OBJECT ALWAYS INCREASE IF A NET FORCE ACTS ON IT? lizellexs https://padlet.com/lizellexs/kdmwa7kmmfar/wish/616690746
  • No. 
  • Momentum will decrease if the net force acts in the opposite direction to motion.
  • E.g. friction acting on an object.
    • ]]>     2020-06-08 11:55:19 UTC https://padlet.com/lizellexs/kdmwa7kmmfar/wish/616690746     lizellexs https://padlet.com/lizellexs/kdmwa7kmmfar/wish/617313700 2020-06-08 17:03:51 UTC https://padlet.com/lizellexs/kdmwa7kmmfar/wish/617313700 IMPULSE lizellexs https://padlet.com/lizellexs/kdmwa7kmmfar/wish/617320351 2020-06-08 17:07:18 UTC https://padlet.com/lizellexs/kdmwa7kmmfar/wish/617320351 CONSERVATION OF MOMENTUM & COLLISIONS lizellexs https://padlet.com/lizellexs/kdmwa7kmmfar/wish/619585801
  • A System = a portion of the universe under study, with two or more objects interacting.
  • Isolated system = System with constant mass and no net external force.
  • Law of conservation of linear momentum = Total linear momentum of an isolated system remains constant (conserved).
    • ]]>     2020-06-09 21:01:43 UTC https://padlet.com/lizellexs/kdmwa7kmmfar/wish/619585801     lizellexs https://padlet.com/lizellexs/kdmwa7kmmfar/wish/619597163 2020-06-09 21:12:22 UTC https://padlet.com/lizellexs/kdmwa7kmmfar/wish/619597163 lizellexs https://padlet.com/lizellexs/kdmwa7kmmfar/wish/619598677 2020-06-09 21:13:54 UTC https://padlet.com/lizellexs/kdmwa7kmmfar/wish/619598677 lizellexs https://padlet.com/lizellexs/kdmwa7kmmfar/wish/619599679 2020-06-09 21:14:59 UTC https://padlet.com/lizellexs/kdmwa7kmmfar/wish/619599679 lizellexs https://padlet.com/lizellexs/kdmwa7kmmfar/wish/619604559 2020-06-09 21:19:53 UTC https://padlet.com/lizellexs/kdmwa7kmmfar/wish/619604559 lizellexs https://padlet.com/lizellexs/kdmwa7kmmfar/wish/619607644 2020-06-09 21:22:55 UTC https://padlet.com/lizellexs/kdmwa7kmmfar/wish/619607644 lizellexs https://padlet.com/lizellexs/kdmwa7kmmfar/wish/619609700 2020-06-09 21:25:02 UTC https://padlet.com/lizellexs/kdmwa7kmmfar/wish/619609700 lizellexs https://padlet.com/lizellexs/kdmwa7kmmfar/wish/619645868 2020-06-09 22:02:21 UTC https://padlet.com/lizellexs/kdmwa7kmmfar/wish/619645868 HOMEWORK - EX 4 lizellexs https://padlet.com/lizellexs/kdmwa7kmmfar/wish/619650824 What is the link between R2-D2 and science homework?]]> 2020-06-09 22:07:42 UTC https://padlet.com/lizellexs/kdmwa7kmmfar/wish/619650824 lizellexs https://padlet.com/lizellexs/kdmwa7kmmfar/wish/620291257 2020-06-10 08:43:05 UTC https://padlet.com/lizellexs/kdmwa7kmmfar/wish/620291257 lizellexs https://padlet.com/lizellexs/kdmwa7kmmfar/wish/630816945 2020-06-17 16:07:11 UTC https://padlet.com/lizellexs/kdmwa7kmmfar/wish/630816945 lizellexs https://padlet.com/lizellexs/kdmwa7kmmfar/wish/630817563 2020-06-17 16:07:35 UTC https://padlet.com/lizellexs/kdmwa7kmmfar/wish/630817563 lizellexs https://padlet.com/lizellexs/kdmwa7kmmfar/wish/630836250 2020-06-17 16:17:53 UTC https://padlet.com/lizellexs/kdmwa7kmmfar/wish/630836250 lizellexs https://padlet.com/lizellexs/kdmwa7kmmfar/wish/638579635 2020-06-24 10:21:05 UTC https://padlet.com/lizellexs/kdmwa7kmmfar/wish/638579635 IMPULSE-MOMENTUM THEOREM APPLICATIONS lizellexs https://padlet.com/lizellexs/kdmwa7kmmfar/wish/638583631
  • Airbags
  • Truck arrestor beds
  • Sports
    • ]]>     2020-06-24 10:25:51 UTC https://padlet.com/lizellexs/kdmwa7kmmfar/wish/638583631     lizellexs https://padlet.com/lizellexs/kdmwa7kmmfar/wish/638583864 2020-06-24 10:26:10 UTC https://padlet.com/lizellexs/kdmwa7kmmfar/wish/638583864 lizellexs https://padlet.com/lizellexs/kdmwa7kmmfar/wish/638584034 2020-06-24 10:26:28 UTC https://padlet.com/lizellexs/kdmwa7kmmfar/wish/638584034 lizellexs https://padlet.com/lizellexs/kdmwa7kmmfar/wish/638584324 2020-06-24 10:26:50 UTC https://padlet.com/lizellexs/kdmwa7kmmfar/wish/638584324 lizellexs https://padlet.com/lizellexs/kdmwa7kmmfar/wish/639202950 2020-06-24 20:13:36 UTC https://padlet.com/lizellexs/kdmwa7kmmfar/wish/639202950 ARRESTOR BEDS lizellexs https://padlet.com/lizellexs/kdmwa7kmmfar/wish/639221105 2020-06-24 20:33:28 UTC https://padlet.com/lizellexs/kdmwa7kmmfar/wish/639221105 CAPS SYLLABUS lizellexs https://padlet.com/lizellexs/kdmwa7kmmfar/wish/639229060 Impulse
     Define impulse (J) as the product of the net force and the contact time
     Solve problems using J = Fnet. t
     Know impulse is a vector and in the same direction as the net force vector
    Know that impulse and change in momentum are equivalent, i.e. J = DELTA p
     Solve problems using net delta p = F    net . delta t
     Apply the concept of impulse in everyday life, e.g. airbags, catching a hard ball    ]]>     2020-06-24 20:42:03 UTC https://padlet.com/lizellexs/kdmwa7kmmfar/wish/639229060     lizellexs https://padlet.com/lizellexs/kdmwa7kmmfar/wish/647863452 2020-07-05 22:49:42 UTC https://padlet.com/lizellexs/kdmwa7kmmfar/wish/647863452 lizellexs https://padlet.com/lizellexs/kdmwa7kmmfar/wish/647863576 2020-07-05 22:49:58 UTC https://padlet.com/lizellexs/kdmwa7kmmfar/wish/647863576 lizellexs https://padlet.com/lizellexs/kdmwa7kmmfar/wish/661214972 2020-07-23 17:45:44 UTC https://padlet.com/lizellexs/kdmwa7kmmfar/wish/661214972 lizellexs https://padlet.com/lizellexs/kdmwa7kmmfar/wish/661215610 2020-07-23 17:46:42 UTC https://padlet.com/lizellexs/kdmwa7kmmfar/wish/661215610 lizellexs https://padlet.com/lizellexs/kdmwa7kmmfar/wish/661216668 2020-07-23 17:48:14 UTC https://padlet.com/lizellexs/kdmwa7kmmfar/wish/661216668 lizellexs https://padlet.com/lizellexs/kdmwa7kmmfar/wish/661217011 2020-07-23 17:48:44 UTC https://padlet.com/lizellexs/kdmwa7kmmfar/wish/661217011 lizellexs https://padlet.com/lizellexs/kdmwa7kmmfar/wish/661217167 2020-07-23 17:48:57 UTC https://padlet.com/lizellexs/kdmwa7kmmfar/wish/661217167 lizellexs https://padlet.com/lizellexs/kdmwa7kmmfar/wish/661217338 2020-07-23 17:49:12 UTC https://padlet.com/lizellexs/kdmwa7kmmfar/wish/661217338 lizellexs https://padlet.com/lizellexs/kdmwa7kmmfar/wish/661217982 2020-07-23 17:50:05 UTC https://padlet.com/lizellexs/kdmwa7kmmfar/wish/661217982 lizellexs https://padlet.com/lizellexs/kdmwa7kmmfar/wish/661218344 2020-07-23 17:50:41 UTC https://padlet.com/lizellexs/kdmwa7kmmfar/wish/661218344 lizellexs https://padlet.com/lizellexs/kdmwa7kmmfar/wish/661218484 2020-07-23 17:50:54 UTC https://padlet.com/lizellexs/kdmwa7kmmfar/wish/661218484 lizellexs https://padlet.com/lizellexs/kdmwa7kmmfar/wish/661218687 2020-07-23 17:51:13 UTC https://padlet.com/lizellexs/kdmwa7kmmfar/wish/661218687 lizellexs https://padlet.com/lizellexs/kdmwa7kmmfar/wish/661219660 2020-07-23 17:52:39 UTC https://padlet.com/lizellexs/kdmwa7kmmfar/wish/661219660 lizellexs https://padlet.com/lizellexs/kdmwa7kmmfar/wish/661219842 2020-07-23 17:52:53 UTC https://padlet.com/lizellexs/kdmwa7kmmfar/wish/661219842 lizellexs https://padlet.com/lizellexs/kdmwa7kmmfar/wish/661220156 2020-07-23 17:53:22 UTC https://padlet.com/lizellexs/kdmwa7kmmfar/wish/661220156 lizellexs https://padlet.com/lizellexs/kdmwa7kmmfar/wish/661220329 2020-07-23 17:53:39 UTC https://padlet.com/lizellexs/kdmwa7kmmfar/wish/661220329 lizellexs https://padlet.com/lizellexs/kdmwa7kmmfar/wish/661220674 2020-07-23 17:54:13 UTC https://padlet.com/lizellexs/kdmwa7kmmfar/wish/661220674 lizellexs https://padlet.com/lizellexs/kdmwa7kmmfar/wish/661221035 2020-07-23 17:54:48 UTC https://padlet.com/lizellexs/kdmwa7kmmfar/wish/661221035 lizellexs https://padlet.com/lizellexs/kdmwa7kmmfar/wish/661225222 2020-07-23 18:00:25 UTC https://padlet.com/lizellexs/kdmwa7kmmfar/wish/661225222 lizellexs https://padlet.com/lizellexs/kdmwa7kmmfar/wish/661231837 2020-07-23 18:09:23 UTC https://padlet.com/lizellexs/kdmwa7kmmfar/wish/661231837 lizellexs https://padlet.com/lizellexs/kdmwa7kmmfar/wish/661237805 2020-07-23 18:17:45 UTC https://padlet.com/lizellexs/kdmwa7kmmfar/wish/661237805 lizellexs https://padlet.com/lizellexs/kdmwa7kmmfar/wish/661248185 2020-07-23 18:32:48 UTC https://padlet.com/lizellexs/kdmwa7kmmfar/wish/661248185 lizellexs https://padlet.com/lizellexs/kdmwa7kmmfar/wish/661249593 2020-07-23 18:34:59 UTC https://padlet.com/lizellexs/kdmwa7kmmfar/wish/661249593 lizellexs https://padlet.com/lizellexs/kdmwa7kmmfar/wish/661253528 2020-07-23 18:41:34 UTC https://padlet.com/lizellexs/kdmwa7kmmfar/wish/661253528 “AMOUNT OF MOTION” lizellexs https://padlet.com/lizellexs/kdmwa7kmmfar/wish/819689727 Example 1:]]> 2020-10-11 14:23:46 UTC https://padlet.com/lizellexs/kdmwa7kmmfar/wish/819689727 What you should know by the end of this section: lizellexs https://padlet.com/lizellexs/kdmwa7kmmfar/wish/819773847
  • Momentum is the product of mass and velocity. 
  • Momentum is a vector quantity. 
  • Momentum is always conserved in collisions. 
  • The law of conservation of momentum: The total linear momentum of an isolated system is conserved.
  • If there are no external forces acting on a system, the total linear momentum of all particles or objects in the system remains constant. 
  • A change in momentum of objects require a change of velocity, hence it requires a force.
  • Solve collision problems in physics by equating the before and after momentum:   p before = p after
    • ]]>     2020-10-11 16:00:51 UTC https://padlet.com/lizellexs/kdmwa7kmmfar/wish/819773847     INTRODUCTION TO MOMENTUM lizellexs https://padlet.com/lizellexs/kdmwa7kmmfar/wish/819784024
  • Define momentum. 
  • Calculate the momentum of a moving object.   
    • ]]>     2020-10-11 16:12:26 UTC https://padlet.com/lizellexs/kdmwa7kmmfar/wish/819784024     lizellexs https://padlet.com/lizellexs/kdmwa7kmmfar/wish/819821126 Example 2:]]> 2020-10-11 16:54:51 UTC https://padlet.com/lizellexs/kdmwa7kmmfar/wish/819821126 MOMENTUM IS A VECTOR lizellexs https://padlet.com/lizellexs/kdmwa7kmmfar/wish/819828908
  • Momentum has both magnitude and direction. 
  • It can have positive and negative values. 
  • Negative answers must be changed to positive final value with direction. 
    • ]]>     2020-10-11 17:03:39 UTC https://padlet.com/lizellexs/kdmwa7kmmfar/wish/819828908     EXAMPLE 1 lizellexs https://padlet.com/lizellexs/kdmwa7kmmfar/wish/819864062 A car (m=2000kg) travels at 32 m.s-1. What is its momentum?]]> 2020-10-11 17:44:16 UTC https://padlet.com/lizellexs/kdmwa7kmmfar/wish/819864062 CHECK POINT lizellexs https://padlet.com/lizellexs/kdmwa7kmmfar/wish/819872348 An 8kg bowling ball is rolling straight towards you. Its momentum is 16kg.m.s-1. How fast is it traveling?










    ]]>     2020-10-11 17:54:09 UTC https://padlet.com/lizellexs/kdmwa7kmmfar/wish/819872348     PRACTICE QUESTIONS lizellexs https://padlet.com/lizellexs/kdmwa7kmmfar/wish/819879000 1.
    What is the momentum of a child and wagon if the total mass of the child and wagon is 22kg and the velocity is 1.5m/s?                       [Answer: 33kg.m/s]
    2.  
    The parking brake on a 1200kg car has broken, and the vehicle has reached a momentum of 7800kg.m/s. What is the velocity of the vehicle? [Answer: 6.5m/s]
    ]]>     2020-10-11 18:02:07 UTC https://padlet.com/lizellexs/kdmwa7kmmfar/wish/819879000     lizellexs https://padlet.com/lizellexs/kdmwa7kmmfar/wish/819899278 2020-10-11 18:25:43 UTC https://padlet.com/lizellexs/kdmwa7kmmfar/wish/819899278 lizellexs https://padlet.com/lizellexs/kdmwa7kmmfar/wish/3907281013 2026-05-11 16:42:53 UTC https://padlet.com/lizellexs/kdmwa7kmmfar/wish/3907281013