Physics by Landry

Acceleration

ll2bucao — 2015-04-07 16:20:41 UTC

Objects that are changing their speed or direction to go faster and to get a higher place while traveling

Centripetal force

ll2bucao — 2015-04-07 16:25:14 UTC

Like when you are on a roller coaster and there is a loop, the roller coaster will pull inwards to follow the track so it won't just keep going the same direction

G

ll2bucao — 2015-04-07 16:26:58 UTC

A g is a unit of acceleration equal to the acceleration caused by gravity.

Momentum

ll2bucao — 2015-04-07 16:28:13 UTC

Momentum is just how much motion an object has

Weightlessness

ll2bucao — 2015-04-07 16:29:29 UTC

It's like when you are on the roller coaster, when you go down the hill the roller coaster has downwards pull so when you are in the roller coaster the only thing holding you down is the bars on the coaster, that's when you are feeling weightless because nothing is holding you, you are pretty much floating. Riders are not really weightless, they only feel like that because the roller coaster is building kinetic energy and it's only focused on the roller coaster not you.

What is friction ?

ll2bucao — 2015-04-07 16:38:44 UTC

the resistance that one surface or object encounters when moving over another.

"a lubrication system that reduces friction"

How does friction relate to roller coasters?

ll2bucao — 2015-04-07 16:40:15 UTC

In roller coasters, friction is a force that opposes motion and significantly slows the cars as they move on the track.

Potential energy

ll2bucao — 2015-04-07 16:54:53 UTC

It is waiting to happen. It is like a rubber band and when it snaps it goes to you and hurts you. PE is greatest when it is going up the hill and least when it is going down the hill.

Potential energy =mass X g X height

PE = mh X (9.8 m/s/s)

1 Joule

ll2bucao — 2015-04-07 17:07:53 UTC

= 1. Kg m squared over s squared

The video about the roller coaster (KE and PE )

ll2bucao — 2015-04-07 17:14:23 UTC

When the roller coaster is rising the potential energy is too so when the roller coaster is starting to roll down, the kinetic energy builds so it has enough to build potential energy again when it is going back up.

History of roller coasters

ll2bucao — 2015-04-07 17:21:15 UTC

The oldest roller coasters descended from the "Russian roller coasters," which were specially constructed hills of ice Located especially around Saint Petersburg, Russia. Built in the 17th century, the slides were built to a height of between 70 feet (21 m) and 80 feet (24 m), consisted of a 50 degree drop, and were reinforced by wooden supports. These slides became popular with the Russian upper class. The biggest roller coaster in the world is Kingda Ka at Six Flags Great Adventure in the U.S., the height is 465 ft ( 139m ). Manufactured in Intamin. The fastest roller coaster is Formula Rossa at Ferrari World in the United Arab Emiratus, the speed is 149 mph (240 km/h) manufactured in Intamin. The tallest roller coaster is Colossos at Heide Park in Germany, the heightism 197ft (60m), manufactured in Intamin

Raven turn ( roller coaster elements

ll2bucao — 2015-04-07 17:26:08 UTC

Cobra roll ( roller coaster elements

ll2bucao — 2015-04-07 17:27:28 UTC

Major question

ll2bucao — 2015-04-07 17:31:26 UTC

The roller coaster continues to move when you only use the engine because the potential energy is building up so it can go up and when it goes down the kinetic energy builds and helps with the next time it goes up

ll2bucao — 2015-04-10 19:33:38 UTC

Kinetic

ll2bucao — 2015-04-10 19:44:02 UTC

the energy of motion, molecules are always moving, not going anywhere. It is the same energy as when I or you move. KE is greatest when the roller coaster is going down. The least is when it is trying to get up the hill.

Kinetic = 1/2 X mass X velocity squared

KE=1/2 mv squared

ll2bucao — 2015-04-13 15:48:14 UTC

Average speed

ll2bucao — 2015-04-13 16:21:36 UTC

91.44 cm/2.39s= 38.58cm/s

Potential energy

ll2bucao — 2015-04-14 03:37:57 UTC

0.0055 times 2.39s times 395cm =4.68 cm/s

Kinetic energy

ll2bucao — 2015-04-14 03:42:20 UTC

.5 times 0.0055 times 2.39s =0.0065725cm/s

Figuring out how to

ll2bucao — 2015-04-14 14:00:19 UTC

Velocity equals distance over time

Speed equals distance over time

Speed is the same as average

Distance equals speed times time

Time equals distance divided by speed

Slope is change in position over change in time

Accelerating is change in speed (m/a) over time (s)

A equals final speed minus initial speed over

Force equals mass times accelerating

Momentum equals mass times velocity

G

ll2bucao — 2015-04-14 17:32:13 UTC

Motion is described using a reference points compared to reference directions

1st, 2nd, 3rd laws

ll2bucao — 2015-04-14 17:35:55 UTC

An object at rest remains at rest, and an object in motion remains in motion with the same velocity, unless acted on by an unbalanced force

The acceleration of an object depends on the objects mass and the amount of force applied

For every action, there is an equal and opposite reaction

Speed, average speed, velocity

ll2bucao — 2015-04-14 17:39:48 UTC

The rate at which an object moves; the distance an object travels In a certain amount of time.

AS: the total distance an object travels over the total time.

V: speed in specific direction.

Other

ll2bucao — 2015-04-14 17:52:13 UTC

Sliding friction: when a box being pushed across the floor, sliding force acts between the box and the floor

Static: if you stand on the side of the hill, static friction keeps you from sliding down the hill

BUOYANT: force of an object is the upward force equal to the weight of the displaced fluid

Net force: the net force is the combination of all forces acting on the object

Newtons: in the metric system, all forces are measured in newtons

Normal force: the normal force acts perpendicular to the surface of a book resting on a table, and balances the weight of the book

Gravity: is the force of attraction between all objects in the universe

Free fall: when an object is acted upon only by gravity, it is said to be in free fall.

Motion

ll2bucao — 2015-04-14 18:01:13 UTC

Motion is described using a reference points compared to reference directions

USE UNTIS!!!!!!!!!

ll2bucao — 2015-04-14 18:03:17 UTC

Position and speed

ll2bucao — 2015-04-15 14:05:52 UTC

To calculate the speed of an object on a position vs time graph use speed equals distance over time

To calculate the distance of an object on a speed vs time graph use distance equals speed times time