# PHYSICS

posted by .

1. A body of mass 400g dropped from a height of 30m. If after rebounce the ball loses 2/3 of its energy, calculate: <a>.the velocity before bounce, .the height after rebounce, <c>.the velocity after rebounce

• PHYSICS -

a. V^2 = Vo^2 + 2g*d.
V^2 = 0 + 19.6*30 = 588
V = 24.2 m/s.

## Similar Questions

1. ### physics

A ball is launched from the ground at a 45 degree angle above the horizontal (which we take to be the x-axis). It rises to a maximum height, falls back down to the ground and bounces. After the bounce its velocity again makes a 45◦ …
2. ### physics

a superball of mass .125 kg is dropped onto a concrete floor from a height of 1m it bounces back at a height of .9m. What is the net force acting on the ball before and after its released?
3. ### physics

A superball is dropped from rest from a height of 2.0m. It bounces repeatedly from the floor, as superballs are prone to do. After each bounce the ball dissipates some energy, so eventually it comes to rest. The following pattern is …
4. ### physics

A superball is dropped from rest from a height of 2.0m. It bounces repeatedly from the floor, as superballs are prone to do. After each bounce the ball dissipates some energy, so eventually it comes to rest. The following pattern is …
5. ### Algebra II

Help me with this, please... A ball is dropped vertically from a height of 80 meters. After each bounce, the ball reaches a maximum height equal to 60 percent of maximum height of the previous bounce. a. Write the first three terms …
6. ### basic chemistry(projectile)

A ball of mass 400g is thrown with an initial velocity of 30.0 ms-1 at an angle of 45.0 degrees to the horizontal.air resistance is negligible.the ball reaches a maximum height H after a time of 2.16s (1)calculate the initail kinetic …
7. ### Physics

2. Consider the ball example in the introduction when a ball is dropped from 3 meters. After the ball bounces, it raises to a height of 2 meters. The mass of the ball is 0.5 kg a. What is the speed of the ball right before the bounce?
8. ### science

A ball from a height 'h' on a horizontal floor.If it loses 60% of its energy on hitting the floor then height upto which it will rise after first rebounce is?
9. ### Physics

A ball is drop from a height of 20m and rebounce with a velocity which is 3/4 of this velocity with which it hit the ground. What is the time interval between the first and second bounces?
10. ### Physics

A ball mass 1000g is drop from a height Of 5m and rebounded to a height Of 25 m. Find i it kintentic just before impact ii its intial rebounce velocity and kintentic and show the working.

More Similar Questions