Physics AP Test: Chapters 5 and 6 Form 1 ∑ = a F m N f F F μ = r v a c 2 = a dx v dv = dx v dt = dv a dt = 1 1 n n A Ax dx x n + = + ∫ ( 29 ( 29 1 sin cos Bt dt Bt B = -∫ ( 29 ( 29 1 sin cos A Bt dt A Bt B + = -+ ∫ Bx Bx A Ae dx e B = ∫ ( 29 ( 29 1 cos sin Bt dt Bt B = ∫ ( 29 ( 29 1 cos sin A Bt dt A Bt B + = + ∫ A child is playing with four blocks, as shown at right. She applies a force of 20 N to block A and makes all four blocks slide to the right. The coefficient of kinetic friction between the blocks and the floor is 0.30. 1) What normal force acts between block B and block C? A block of length L = 2 m and mass m = 2 kg is placed on an inclined plane made up of two distinct surfaces, as shown at right. The block initially rests completely on the frictionless surface with its front edge at x = 0, right next to the rough surface of kinetic friction coefficient k = 0.4. When the block is released from rest, it slides down the incline so that more and more of the bar is in contact with the rough surface. 2)
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