KINEMATICS - HORIZONTAL & VERTICAL PROJECTILE MOTION by Lizelle Swanepoel

EQUATIONS OF MOTION

lizellexs — 2020-07-13 00:34:20 UTC

FOR USE WHEN YOU DO BOTH HORIZONTAL OR VERTICAL MOTION PROBLEMS:

The Law of Falling Bodies

lizellexs — 2020-07-13 00:34:20 UTC

Watch this video as introduction. In your own time.

FREEFALL - falling under the influence of gravity only

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THE LAW OF FALLING BODIES:
In a vacuum, all bodies fall with the same constant acceleration.

lizellexs — 2020-07-13 00:34:20 UTC

4 MAIN SCENARIOS OF VERTICAL MOTION

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Answers to first exercises in Booklet

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Exercise 1.2

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Homework Answers - EXERCISE 1.3

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Mark Ex 1.3 - Q1,3,5,6

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BOUNCING OBJECTS

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BOUNCING BALL GRAPHS

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Using Tracker:

Inelastic bouncing

lizellexs — 2020-07-13 00:34:20 UTC

With inelastic bouncing:

E_k of object after bouncing < E_k of object before bouncing
Rebound velocity after bounce < impact velocity upon bounce

Before the drop

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After the drop and first bounce

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ELASTIC BOUNCING

lizellexs — 2020-07-13 00:34:20 UTC

With elastic bouncing:

E_k of object after bouncing = E_k of object before bouncing
Rebound velocity after bounce = impact velocity upon bounce

INELASTIC BOUNCING

lizellexs — 2020-07-13 00:34:20 UTC

With inelastic bouncing:

E_k of object after bouncing < E_k of object before bouncing
Rebound velocity after bounce < impact velocity upon bounce

STACKED BOUNCING BALLS 🏀

lizellexs — 2020-07-13 00:34:20 UTC

INELASTIC BOUNCING

lizellexs — 2020-07-13 00:34:20 UTC

With inelastic bouncing:

E_k of object after bouncing < E_k of object before bouncing
Rebound velocity after bounce < impact velocity upon bounce

BALL BOUNCE PROBLEM

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HOW TO GRAPH
Choose down as positive direction:

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1.3.8 Draw the v-t graph for the motion of the ball.
Down is positive direction:

lizellexs — 2020-07-13 00:34:20 UTC

1.3.9 Calculate the displacement of the ball.
Down is positive direction:

lizellexs — 2020-07-13 00:34:20 UTC

1.3.10 Draw the position-time graph for the motion of the ball.
Down is positive direction:

lizellexs — 2020-07-13 00:34:20 UTC

1.3.11 Use the ground as reference position, and re-draw the position-time graph.

BOUNCING BALL PROBLEM

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Galileo and Falling Bodies

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ANSWERS TO GRAPHING QUESTIONS

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HORIZONTAL MOTION

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VERTICAL MOTION

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SIGNS OF VARIABLES

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uvast variables

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TYPES OF PROBLEMS ON VERTICAL PROJECTILE MOTION

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EXAMPLES

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HOT AIR BALLOON EXAMPLE

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ANSWER

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SOLUTION

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lizellexs — 2020-09-05 18:32:38 UTC

HOW TO USE THIS PADLET

lizellexs — 2020-09-07 13:03:48 UTC

Magnify posts by clicking ctrl+ on your computer
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Watch all posted videos in the Padlet to assist learning this section
Watch all my posted teaching videos on Classroom as overview of each topic
Download PhET's DC Kit virtual Lab to physically build circuits yourself given to you in harder problems to assist understanding of circuit rules.