Question

You are bouncing a 50 gram ball off of the ground and notice that it seems to be coming up off the ground slower than it was moving down. You grab your phone and take a slow motion video of the bounce that occurs. In the video, you see that it is moving down at 1.2 m/s before the bounce, and then it is moving up at 0.9 m/s after the bounce. The bounce itself lasted 4 frames at 120 frames/second, or 1/30 of a second.

1.What is the average acceleration of the bouncy ball during the bounce?

2.Draw a stacked addition table for the forces on the ball during the bounce.

3.Draw a force diagram for the ball during the bounce.

4.What is the magnitude of the force of the ground on the ball during the bounce?

5.Why isn’t the force of the ground on the ball equal and opposite to the force of the Earth on the ball?

Answer 1

giveno mass of the ball m= 5ogram =50 x 10-3 gm, at I see | m = .050 Ya v =- 2+14 (1мл теле «4») lave erga Show down word motion, 2 = 0.gm/s (Juslafle collision with ground 0 Anerage acceleration - Change in velocuty time clapsed - - 0.9-1--2). 9-1730 (130) Ta = 63 m/s2 - 7 Folce ball Table befor, during and after the bounce of Cone Force Before during / After I Interaction force Interaction force : It is the force transfer between the colliding body during the time of contact This force initially zero then increases, reach masumum and then direases, becomes zero after losing contact ) A Average force is time ① magnitude of force which I q m contact responsible to the a releasing Change in velocity Fama=54103 63 If = 0.315N to The reaction action force is only applicable when bath body are al rest in the direction of harmal reaction. But in this case body is moving along the direction of normal reaction (Impact Contact becoming stronger force)