Posted by **Sam** on Monday, September 27, 2010 at 10:40pm.

You and two friends are on top of the library 30 m above the ground. At the same time that you drop a ball, from rest, one of your friends tosses a ball straight up, giving it an initial velocity of 15 m/s, and your other friend tosses a ball straight down, giving it an initial velocity of -15m/s. Note that each ball, once released from the tosser's hand will accelerate at -9.8m/s^2.

a) Assume the t=0 sec corresponds to when the three balls were released, what times will each ball strike the ground?

b) When the ball was tossed downward is 15 m above the ground, what will be the positions of the other two balls?

## Answer this Question

## Related Questions

- physics - A man tosses a 50.0 g ball straight upward from the ground at 25m/s. ...
- physics - A ball is dropped from rest at the top of a 5.89-m-tall building, ...
- Physics - The Colliding Balls: A ball is released from rest at a height h above ...
- physics - Two students are on a balcony 18.3 m above the street. One student ...
- physics - Two students are on a balcony 18.3 m above the street. One student ...
- physics - You stand at the top of a cliff while your friend stands on the ground...
- Physics - Kevin stands at the edge of a cliff, holding one ball in each hand. He...
- Physics - Two students are on a balcony 19.6 m above the street. One student ...
- Physics - A soccer player kicks a 0.43 kg ball straight up to see how far it ...
- Physics Correction - You drop a ball from a window on an upper floor of a ...