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AP Physics 1
3.4 Conservation of Energy
2.7 Kinetic and Static Friction
Multi-Unit
IntermediateMCQMathematical16.8k
Two blocks of different masses moving with the same initial kinetic energy toward a rough patch.
Two blocks of different masses moving with the same initial kinetic energy toward a rough patch.
Block 1 of mass \(M\) and Block 2 of mass \(2M\) are sliding on a frictionless horizontal surface with the same initial kinetic energy \(K_0\). The blocks then encounter a rough horizontal patch with a constant coefficient of kinetic friction \(\mu\) and slide until they come to rest. Let \(d_1\) and \(d_2\) be the distances the blocks slide on the rough patch, and let \(Q_1\) and \(Q_2\) be the total thermal energy generated by friction for each block. Which of the following correctly compares the stopping distances and the thermal energy for the two blocks?

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