Posted by **Kate** on Tuesday, July 5, 2011 at 11:39am.

You throw a ball downwards with a speed of 10 m/s. It hits the ground 4 meters below from where you threw it. How long is the ball in the air and what is the ballâ€™s velocity just before it hits?

- physics -
**bobpursley**, Tuesday, July 5, 2011 at 12:19pm
vf^2=vi^2+2ad where a=9.8m/s^2, vi=10m/s

solve for vf. then,

Vf=vi+gt Vf is negative, vi is -10, g is -9.8m/s^2 solve for t

## Answer This Question

## Related Questions

- physics - A child throws a ball with an initial speed of 8 m/s at an angle of 40...
- physics - You throw a 1kg ball out of a window 12 meters above the ground with ...
- physics - You throw a 1kg ball out of a window 12 meters above the ground with ...
- physics - You throw a 1kg ball out of a window 12 meters above the ground with ...
- Physics - A ball is shot from the ground into the air. At a height of 9.1 m, the...
- Physics - A tennis ball is thrown horizontally from an elevation of 20.60 m ...
- physics - A ball is tossed so that it bounces off the ground, rises to height ...
- physics - A ball is tossed so that it bounces off the ground, rises to a height ...
- physics - A woman throws a ball at a vertical wall 40m away the ball is 20m ...
- PHYSICS - A tennis ball is thrown horizontally from an elevation of 20.60 m ...

More Related Questions