# Rock Tossed Into the Air

by punkytrixter
Tags: rock, tossed
 P: 1 Hello, if someone could help me with the second part of this problem, I would be so grateful. A rock is tossed straight up with a velocity of + 20 m/s When it returns, it falls into a hole 10 m deep. What is the rock's velocity as it hits the bottom of the hole? I got -24.4 m/s for this. How long is the rock in the air, from the instant it is released until it hits the bottom of the hole? This is what I have no idea how to figure out. Any help you can give me would be much appreciated.
 P: 4,008 Well what equations do you use to describe the object's trajectory as a function of time ? marlon
 P: 16 Dont you need the a (or g) value to work this out as the object falls freely on the descend?
P: 4,008

## Rock Tossed Into the Air

The acceleration is indeed the g-vector.

marlon

ps : check out this TUTORIAL

The answer you are looking for is right in there

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