Posted by **amber** on Tuesday, October 31, 2006 at 9:12am.

Hello,

I don't know how about to answering this question:

work out the problem of a ball of mass m that falls a distance h from rest. It hits the floor and rebounds to its starting height. (a) What total time ie required for the motion? (Neglect the time of contact with the floor.) (b) What is the speed of the ball as it strikes the floor? (c) What is the change in momentum of the ball as it strikes the floor and rebounces? (d) Calculate the average force that the ball exerts on the floor averaged over the whole time interval of part (a). Is this surprising?

Is there like a formula in particular that I should be looking at?

The return bounce takes as long as it takes to fall, so find the time of fall and double it.

h=1/2 g t^2 solve for time.

speed= g * time

change of momentum= 2* momentumat floor

= 2*m*speed

The force of the ball is gravitational pull, which is mg. That is the force on the ball, and it is the force on the Earth.

You can get the force also by doing change of momentum/totaltimefalling.

Neat. This doesn't surprise me, gravity is gravity.

## Answer This Question

## Related Questions

- physics - In the Atwood's machine of Figure 8-23, the two masses shown are ...
- PHYSICS WORK PROBLEM due tonight!! please help! - A ball of mass 522 g starts at...
- Physics - A rubber ball, with a mass of 40.0 grams is dropped from rest from a ...
- physics - A wood block falls from a shelf and hits the ground after 1.2 s. The ...
- Physics. LAST PROBLEM!! - A small metal ball with a mass of m = 82.5 g is ...
- physics - a superball of mass .125 kg is dropped onto a concrete floor from a ...
- Physics - I've figured out the first part that the v is 1.25 m/s, but even with ...
- Physics - Ball A leaves the edge of a level table with speed Va and falls to the...
- Physics Please Help! - A small metal ball with a mass of m = 78.9 g is attached ...
- Physics - A 1.5 kg basketball is thrown to the floor. At the moment it first ...

More Related Questions