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Rock Tossed Into the Air 
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#1
May2506, 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. 


#2
May2506, 04:32 PM

P: 4,006

Well what equations do you use to describe the object's trajectory as a function of time ?
marlon 


#3
May2506, 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?



#4
May2506, 05:27 PM

P: 4,006

Rock Tossed Into the Air
The acceleration is indeed the gvector.
marlon ps : check out this TUTORIAL The answer you are looking for is right in there 


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