- #1
sideman123
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Homework Statement
a 2 kg block rests on a horizontal frictionless surface, and is initially at rest. a 1 kg block rests on top of the 2kg and initially moving at v=3m/s (to the right). the coefficients of friction between he two blocks are MUs=.2 and MUk=.1 . A force is applied to the top block such as to keep it always moving at the same velocity. you can assume the top block never falls off the bottom block. what will the bottom block do?
the answer is always move at a constant speed to the right.
i don't understand this. i know friction exists between the top and bottom block, but how does that get the bottom block to move with the top block to the right. I generally believed friction acts in the opposite direction of which the force is applied?
if it would help, i can post a picture
thanks