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

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In a vacuum, all bodies fall with the same constant acceleration.

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·        Projectile:
an object which has been given an initial velocity which then moves under the influence of the gravitational force only.

·        Free fall:
the motion during which the only force acting on an object is gravitational force.

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Mark Ex 1.3 - Q1,3,5,6

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Ball bouncing in slow motion: Rubber ball

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BOUNCING BALL PHYSICS

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Ball bouncing in slow motion: Rubber ball

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Using Tracker:

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Use of Tracker to understand Bouncing Ball Kinematics Graphs

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With elastic bouncing:

Ek of object after bouncing = Ek of object before bouncing

Rebound velocity after bounce = impact velocity upon bounce

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Kinematics Graph  Bouncing Ball Elastic ~xmphysics0

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With inelastic bouncing:

Ek of object after bouncing < Ek of object before bouncing

Rebound velocity after bounce < impact velocity upon bounce

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Kinematics Graph  Bouncing Ball Inelastic ~xmphysics0

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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:

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

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

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

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Episode 4: Inertia - The Mechanical Universe