# science

posted by .

How fast must a fall be thrown upward to reach a height of 12 m?

• science -

How do you throw a fall?

• science -

the initial kinetic energy converts to potential energy at the top.

KE=PE
1/2 m v^2=mgh

solve for v. Notice the mass of the "fall" divides out.

## Similar Questions

1. ### science

a ball is thrown straight upward and returns to the thrower's hand after 3.00s in the air. A second ball is thrown at an angle of 30.0 deg with the horizontal. At what speed must the second ball be thrown so that it reached the same …
2. ### Scientific studies

A stone is thrown vertically upward with a speed of (a) How fast is it moving when it reaches a height of 11.0 m?
3. ### math

How fast would a ball have to be thrown upward to reach a maximum height of 49 ft?
4. ### physical sicence

how fast must a ball be thrown upward to reach a height of 12 m?
5. ### physics

A ball is thrown straight upward from ground level. At what speed must the ball be thrown if it is to reach a maximum height 21 meters above the ground?
6. ### Physics

A stone is thrown vertically upward with a speed of 18.0 m/s. (a)How fast is it moving when it reaches a height of 11.0 m?
7. ### Physics

A stone is thrown vertically upward with a speed of 12.0 m/s. (a) How fast is it moving when it reaches a height of 5.0 m?
8. ### Physics

A stone is thrown vertically upward with a speed of 21.0 m/s a)How fast is it moving when it reaches a height of 15.8 m b)How much time is required to reach this height?
9. ### Science

A stone was thrown upward with the innital velocity. (A)how for does it reach?
10. ### Math

Hoping Henry can help on previous prob. A ball is thrown upwards from a roof top, 80ft above the ground. It will reach a maximum vertical height and then fall back to the ground. The height of the ball from the ground at time T is …

More Similar Questions