# Physics

posted by .

A ball is thrown horizontally from the top of a building 21.6 m high. The ball strikes the ground at a point 123 m from the base of the building. Find the x component of its velocity just before it strikes the ground. Find the y component of its velocity just before it strikes the ground.

• Physics -

Compute how long it takes to fall 21.6 m. Call that time T. You should know that formula.
If not, derive it from
H = 123 m = (g/2) T^2.
The vertical velocity when it hits ground is g*T.
The horizontal velocity remains 123 m/T during flight.

## Similar Questions

1. ### physics

Part 1: A ball is thrown horizontally from the top of a building 28.6 m high. The ball strikes the ground at a point 80.3 m from the base of the building. The acceleration of gravity is 9.8 m/s^2. Find the time the ball is in motion. …
2. ### Physics

A ball is thrown horizontally from the top of a building 21.6 m high. The ball strikes the ground at a point 123 m from the base of the building. Find the x component of its velocity just before it strikes the ground. Find the y component …
3. ### AP Physics

A ball is thrown horizontally from the top of a building 51 m high. The ball strikes the ground at a point 120 m from the base of the building. The acceleration of gravity is 9.8 m/s 2 Find the x component of its velocity just before …
4. ### physics

A ball is thrown horizontally from the top of a building 17.6 m high. The ball strikes the ground at a point 67.7 m from the base of the building. The acceleration of gravity is 9.8 m/s^2 1. Find the time the ball is in motion. Answer …
5. ### Physics

A ball is thrown horizontally from the top of a building 45.2 m high. The ball strikes the ground at a point 78.9 m from the base of the building. The acceleration of gravity is 9.8 m/s 2 . Find the time the ball is in motion, initial …
6. ### Physics

A ball is thrown horizontally from the top of a building 17.6 m high. The ball strikes the ground at a point 67.7 m from the base of the building. The acceleration of gravity is 9.8 m/s2. Find the time the ball is in motion
7. ### Physics test review

A ball is thrown horizontally from the top of a building 30.1 m high. The ball strikes the ground at a point 66.8 m from the base of the building. The acceleration of gravity is 9.8 m/s2 . Find the time the ball is in motion. Answer …
8. ### Physics

A ball is thrown horizontally from the top of a building 45.9 m high. The ball strikes the ground at a point 121 m from the base of the building. The acceleration of gravity is 9.8 m/s2 . Find the time the ball is in motion. Answer …
9. ### physics

A ball is thrown horizontally from the top of a building 43.4 m high. The ball strikes the ground at a point 57.3 m from the base of the building. The acceleration of gravity is 9.8 m/s^2. a. Find the time the ball is in motion. Answer …
10. ### physics

a ball is thrown horizontally from the top of a building 35m. high. the ball strikes the ground at a point 80m from the base of the building. a. find the time the ball is in flight b. its initial velocity c. the x and y components …

More Similar Questions

Post a New Question