What causes a spinning ball to bounce forward?

In summary, the ball in the conversation is given an initial angular velocity of 76 rad/s and allowed to drop vertically from a height of 0.835m. After bouncing, it has a vertical velocity of 3.1m/s upwards and a forward horizontal velocity of 1.838m/s. The ball's horizontal velocity is given by friction. It is possible to relate the loss in angular momentum due to reduced speed to the horizontal velocity gained through the conservation of angular momentum, by considering the radius.
  • #1
Ronald Jack
1
0
The ball is given no initial horizontal velocity. It is however given an initial angular velocity of 76 rad/s and allowed to drop vertically from a height of 0.835m. Right after the ball bounces its vertical velocity is 3.1m/s upwards and its forward horizontal velocity is 1.838m/s and the ball reduced spin. My question is what gives the ball its horizontal velocity? Furthermore would it be possible to relate the loss in angular momentum (due to reduced speed) to the horizontal velocity gained?
 
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  • #2
Ronald Jack said:
My question is what gives the ball its horizontal velocity?
Friction

Ronald Jack said:
Furthermore would it be possible to relate the loss in angular momentum (due to reduced speed) to the horizontal velocity gained?
Yes, via the radius.
 
  • #3
Hello Ron, :welcome:

Please post homework in the homework forum and fill in the template. You post looks very weird, starting with "The ball" ... what ball ?

But I give you compimenets for answering your own question ! Or at least searching in the right direction: conservation of angular momentum.
 

1. What is the physics behind a spinning ball bouncing forward?

The physics behind a spinning ball bouncing forward is due to the principle of conservation of angular momentum. When a ball is spinning, it has angular momentum, which is a measure of its rotational motion. When the ball hits the ground, the friction between the ball and the ground causes a torque, which changes the direction of the ball's angular momentum. This change in angular momentum causes the ball to bounce forward.

2. Does the direction of spin affect the forward bounce of a ball?

Yes, the direction of spin does affect the forward bounce of a ball. When a ball has topspin, meaning the top of the ball is rotating forward, it will bounce forward. Conversely, when a ball has backspin, meaning the top of the ball is rotating backward, it will bounce backward.

3. How does the surface affect a spinning ball's bounce forward?

The surface a spinning ball bounces on can greatly affect its forward bounce. A rough surface will cause more friction and a greater change in the ball's angular momentum, resulting in a stronger forward bounce. A smooth surface, on the other hand, will have less friction and a weaker forward bounce.

4. Can a spinning ball bounce forward on any surface?

No, a spinning ball cannot bounce forward on any surface. The surface must provide enough friction for the ball to grip and change its angular momentum. A surface that is too slippery, such as ice, will not allow for a spinning ball to bounce forward.

5. Is the speed of the spinning ball important for its forward bounce?

Yes, the speed of the spinning ball is important for its forward bounce. A faster spinning ball will have more angular momentum, making it more likely to bounce forward. Additionally, the speed of the ball can affect the amount of friction and torque between the ball and the surface, ultimately impacting its forward bounce.

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