# Physics

A tennis ball isdropped from 1.52m abovethe ground. It rebounds to a height of 0.918 m. With what velocity does it hit the ground? The acceleration of gravity is 9.8 m/s2 . (Let down be negative.) Answer in units of m/s.
(part 2 of 3) With what velocity does it leave the ground? Answer in units of m/s.
(part 3 of 3) If the tennis ball were in contact with the ground for 0.0107 s, ﬁnd the acceleration given to the tennis ball by the ground. Answer in units of m/s2.

1. 👍
2. 👎
3. 👁
1. (1/2) m v^2 = m g h
(1/2) v^2 = gh
or
v = sqrt (2 g h) (remember that for dropped object)
so
v at ground = -sqrt (2*9.8*1.52)

now
goes up .918 meter
same deal in reverse
v up at ground = +sqrt (2*9.8*.918)

a = change in velocity/change in time
= [ +sqrt (2*9.8*.918)- - sqrt (2*9.8*1,52) ] / 0.0107

note - - is +

1. 👍
2. 👎

## Similar Questions

1. ### college physics

a tennis ball is thrown straight up with an initial velocity of 22.5 m/s. it is caught at the same distance above the ground. a). how long does it take to reach its maximum height? b). how high does the ball rise? c). at what

2. ### Physics

You toss a tennis ball straight upward. At the moment it leaves your hand it is at a height of 1.5 m above the ground, and it is moving at a speed of 8.0 m/s. (a) How much time does it take for the tennis ball to reach its maximum

3. ### physics

A tennis ball is dropped from 1.76 m above the ground. It rebounds to a height of 0.928 m. With what velocity does it hit the ground? The acceleration of gravity is 9.8 m/s 2

4. ### physics

A tennis ball is dropped from 1.93 m above the ground. It rebounds to a height of 0.921 m.With what velocity does it hit the ground?The acceleration of gravity is 9.8 m/s2.(Letdown be negative.)Answer in units of m/s.

1. ### Physics

A tennis player hits a ball at ground level, giving it an initial velocity of 24 m/s at 57 degrees above the horizontal. (a) what are the horizontal and verticla components of the ball;s initial velocity? (b) how high above the

2. ### Physics

You toss a tennis ball straight upward. At the moment it leaves your hand it is at a height of 1.5 m above the ground, and it is moving at a speed of 7.8 m/s. (a) How much time does it take for the tennis ball to reach its maximum

3. ### physics

A tennis ball is dropped from 1.47 m above the ground. It rebounds to a height of 1 m. With what velocity does it hit the ground? The acceleration of gravity is 9.8 m/s 2 . (Let down be negative.) Answer in units of m/s. 021 (part

4. ### alg2

suppose you drop a tennis ball from a height of 15 feet. After the ball hits the floor, it rebounds to 85% of its previous height. How high will the ball rebound after its third bounce. round to the nearest tenth.. my teacher told

1. ### physics

020 (part 1 of 3) 10.0 points A tennis ball is dropped from 1.97 m above the ground. It rebounds to a height of 0.901 m. With what velocity does it hit the ground? The acceleration of gravity is 9.8 m/s 2 . (Let down be negative.)

2. ### science

A ball of mass 1 kg dropped from 9.8m height , strikes the ground and rebounds to a height of 4.9m .If the time of contact between ball and ground is 0.1s,then find impulse and average force acting on ball.

3. ### Physics

A tennis ball is dropped from 1.98 m above the ground. It rebounds to a height of 1.05 m. With what velocity does it hit the ground? The acceleration of gravity is 9.8 m/s2 . (Let down be negative.) Answer in units of m/s Confused

4. ### Physics

A tennis ball is dropped from 1.54 m above the ground. It rebounds to a height of 0.845 m. With what velocity does it hit the ground? The acceleration of gravity is 9.8 m/s^2 . (Let down be negative.) Answer in units of m/s.