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Rock Tossed Into the Air

by punkytrixter
Tags: rock, tossed
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punkytrixter
#1
May25-06, 04:21 PM
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.
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marlon
#2
May25-06, 04:32 PM
marlon's Avatar
P: 4,006
Well what equations do you use to describe the object's trajectory as a function of time ?

marlon
Semaphia
#3
May25-06, 05:20 PM
P: 16
Dont you need the a (or g) value to work this out as the object falls freely on the descend?

marlon
#4
May25-06, 05:27 PM
marlon's Avatar
P: 4,006
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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