Homework Help: Physics.

Posted by Kelsey on Tuesday, October 16, 2012 at 3:17pm.

A block of mass 3m is placed on a frictionless horizontal surface, and a second block of mass m is placed on top of the first block. The surfaces of the blocks are rough. A constant force of magnitude F is applied to the first block.

a) Identify the horizontal force that causes the block of mass m to accelerate.
b) Assume that the upper block does not slip on the lower block, and find the acceleration of each block in terms of m and F.

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