Homework Help: Physics

Posted by Syl on Monday, October 11, 2010 at 3:20pm.

Two crates, of mass m1 = 60 kg and m2 = 130 kg, are in contact and at rest on a horizontal surface (Fig. 4-54). A 620 N force is exerted on the 60 kg crate. The coefficient of kinetic friction is 0.15

a)Calculate the acceleration of the system.
b) calculate the force that each crate exerts on the other.
c) Repeat with the crates reversed.

I was able to calculate the acceleration

Physics - Sam, Monday, October 11, 2010 at 3:21pm
try 0.5mv*2=mgh
Physics - Syl, Monday, October 11, 2010 at 3:28pm
This question didn't post properly. I was able to find the acceleration (1.79m/s^2), having difficulties getting the force. what would "h" be in your equation? to me that symbolizes height and there's no height in this problem.
Physics - bobpursley, Monday, October 11, 2010 at 4:18pm
If you have a, then F=ma

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