Posted by **Patel** on Sunday, November 21, 2010 at 10:10pm.

A ball initially at rest is dropped from a window 18.6 m off the ground. How long does it take for the ball to reach the ground? Round your answer to 2 decimal places.

- Physics -
**drwls**, Sunday, November 21, 2010 at 10:17pm
Solve this equation for t:

(1/2) g t^2 = H = 18.6 m

- Physics -
**Patel**, Sunday, November 21, 2010 at 10:30pm
is this equation from kinematics?

- Physics -
**drwls**, Monday, November 22, 2010 at 12:42am
You should have seen the equation in your text by now. It is the solution to Newton's second law of motion when the acceleration (g) is constant and the initial velocity is zero.

You can call it kinematics, mechanics or physics. When I attended college, kinematics meant something else.

## Answer This Question

## Related Questions

- Physics - A ball is rolled off a table that is 0.481 m above the floor. The ball...
- physics - A ball is thrown horizontally off the edge of a cliff with an initial ...
- physics - A ball is thrown downward from a window 16.5 m from the ground with a ...
- physics - A ball is thrown downward from a window 16.5 m from the ground with a ...
- physics - a ball dropped from rest at a height of 50 m above the ground. (a) ...
- Calculus - A stone is dropped from the upper observation deck of a tower, 200 m ...
- Physics - A ball is thrown upwards at 15m/s from a window 20 metres above the ...
- Math - Suppose an object is dropped from a height h0 above the ground. Then its ...
- physics - A)A ball is tossed from an upper-story window of a building. The ball ...
- Physics - A ball is tossed from an upper-story window of a building. The ball ...

More Related Questions