Can you explain this phenomenon?

Question

When I drop a tennis ball with a spin (vertical axis of rotation), I've noticed it rotates much slower after the bounce.

Is this just due to energy loss upon contact with the floor?

And is the fraction of linear kinetic energy just before to just after the bounce equal to the fraction of rotational kinetic energy just before to just after the bounce?

Answer 1

The energy losses are by two completely independent mechanisms. The more elastic the material of the body, the higher it bounces. The more friction between the surface and the floor, the more rotational energy is lost.

Answer 2

A bouncing Ball on the floor is an example of what happens in collision.
In General , a perfectly elastic collision does not exist in complex mass structures. It only Exists between micromasses of light particles.

Hence ,when a ball collides with the Ground the internal structural energy is chalenged forming a reactive force.
At that point the ball has deformed .when this occurs the energy of deformation is what is lost to the surroundings.
Therefore the ball bounces back with less energy than when it started with.
That means that momentum is not conserved in a collision which is not perfectly elastic.

Answer 3

if you used a rubber ball, you will see not only is the spin slower, but often in the opposite direction

I think it's just kinetics, loss of inertia and friction

you can spin a ball really fast and when it hits ground it jumps in a new direction with opposite spin and goes back cyclicly until stops

Answer 4

think of it in terms of angular momentum. this is an AP physics problem that incorporates angular and linear momentum, and it's a course I haven't taken yet.
But I do know enough to say that they are separate quantities. I dont' think one can translate into the other by hitting the ground. In terms of physics this is an inelastic collision for both types of momenta, and so Kinetic energy is lost.

Answer 5

Yes

Answer 6

Yes, I think you had answered your own question.

Answer 7

i can tell u why it spins slower, its because friction with the floor makes it slow down but i dunno about the last part

Answer 8

you are correct,you have just answered your own question! your quite smart ,and thank you .i have learned something new today,again thank you.

Answer 9

Why don't you just enjoy the ******* game.