- Block A rests on top of block B . The table is frictionless but there is friction (a horizontal force) between blocks A and B. Block Bhas mass 6.00 kg and block A has mass 2.00 kg. If the horizontal pull applied to block B equals 12.0 N, then block B has an acceleration of 1.80 m/s. What is the acceleration of block A?
I don't understand the problem. Does not block A and B make a system, so they should have the same velocity and acceleration at all time? If not, why do they have different accelerations? I don't understand this part of the problem either: "pull applied to block B equals 12.0 N, then block B has an acceleration of 1.80 m/s." How do they find this number? And if you apply force to block B, do you not apply force on block A since they lay on top of each other? Sorry, for so many question, I just really want to understand this problem.