# Homework Help: How do I solve this Velocity question?

1. Oct 6, 2005

### pqnd1987

Hi I was wondering if anyone had any clue on this question

While sitting around waiting for interior decorators to finish up in the scroll repository, a bunch of bored and mischievous workers decided that they'd build a catapult. When they finally finished, it was able to shoot a projectile straight up into the air. So. in a move which they later regretted, they decided to launch one of the pyramid blocks, which had a density of 2400 kilograms per cubic meter.

When the block crashed back into the catapult, smashing it to pieces, it was determined to have a velocity of 20 meters per second. Assuming that gravity on Mars is exactly 9.90 meters per second squared, the block hit the catapult at the same elevation as it was launched from the catapult, and there was, miraculously, no air resistance acting on the block, how high, in centimeters, did the block fly above the catapult? Please round to the nearest centimeter.

2. Oct 6, 2005

### dextercioby

First, please post homework questions in the appropriate (sub)forum, not in here.

Second, what are your ideas to get things moving?

Daniel.

3. Oct 6, 2005

4. Oct 6, 2005

### JennaSquared

Not a homework question. Looks like someone is trying to cheat at Lenny Conundrum.

In any case, they give you the acceleration. You need to first find the time it takes the object to fall by using the velocity equation. Then you can find the distance traveled. I won't do it for you because I want the points.

Last edited: Oct 6, 2005