Register to reply

Rock Tossed Into the Air

by punkytrixter
Tags: rock, tossed
Share this thread:
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.
Phys.Org News Partner Science news on
Scientists discover RNA modifications in some unexpected places
Scientists discover tropical tree microbiome in Panama
'Squid skin' metamaterials project yields vivid color display
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 ?

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?

May25-06, 05:27 PM
marlon's Avatar
P: 4,006
Rock Tossed Into the Air

The acceleration is indeed the g-vector.


ps : check out this TUTORIAL

The answer you are looking for is right in there

Register to reply

Related Discussions
The third rock General Discussion 4
Rock and God General Discussion 9
What is a rock? Earth 6
Something tossed through window Classical Physics 2
Algebra II tossed up with Physics Introductory Physics Homework 3