physics

posted by .

A 0.10 kilogram ball dropped vertically from a height of 1.0 meter above the floor bounces back to a height of 0.80 meter. The mechanical energy lost by the ball as it bounces is aprox.

a. 0.080 J
b. 0.20 J
c. 0.30 J
d. 0.78 J

• physics -

E=mgh1-mgh2=mg(h1-h2)=
=0.1•9.8(1-0.8)=0.78 J

• physics -

B.) (.10kg)(10 m/s^2)(0.20m) = .20J

Similar Questions

1. math

the height that a ball bounces varies directly as the height from which it is dropped. A ball dropped from a height of 20cm bounces 16cm a) Find the height of the bounce if the ball is dropped from a height of 280cm b) Find from waht …
2. Physics

A rubber ball dropped from a height of exactly 5 ft bounces (hits the floor) several times, losing 10% of its kinetic energy each bounce. After how many bounces will the ball subsequently not rise above 2 ft?

A ball bounces to 45 percent of its original height. What fraction of its mechanical energy is lost each time it bounces?

A ball bounces to 45 percent of its original height. What fraction of its mechanical energy is lost each time it bounces?
5. maths lit

a ball is dropped from a height of 2r1/3 meters. It bounces to 3/4 of the height from which it fell at each boune. A) determine the height the ball reaches after one bounce. B) how many bounces does it take to bounce less than 1 meter …
6. 11

A ball is dropped vertically from height of 30 meters after bounces.The ball reaches a max height to 60% of height of the previous bounce. What are the terms of the sequence. What is the height to the nearest tenth of a meter of the …
7. Physics

A rubber ball, with a mass of 40.0 grams is dropped from rest from a height of 1.60 m above the floor. It hits the floor, and then reaches a maximum height of 90.0 cm when it comes back up again. In this problem, use g = 10.0 m/s2. …
8. Math

A ball bounces 0.7 of the distance it is dropped. How many bounces will the ball make from a height of 1 meter if a bounce of less than 1 centimeter is to be ignored?
9. physic

A rubber ball dropped from a height of exactly 6 ft bounces several times on the floor, loosing 10% of its kinetic energy each bounce. After how many bounces will the ball subsequently not rise above 3 ft
10. physics

A ball bounces to 34 percent of its original height. *1) What fraction of its mechanical energy is lost each time it bounces?

More Similar Questions