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Question:
Two blocks of mass m1 and m3, connected by a rod of mass m2, are sitting on a low-friction surface, and you push to the left on the right block (mass m1) with a constant force of magnitude F (Figure).
(a) What is the acceleration dvx/dt of the blocks?
(b) What is the vector force →Fnet3 exerted by the rod on the block of mass m3? (|→Fnet3| is approximately equal to the compression force in the rod near its left end.) What is the vector force →Fnet1 exerted by the rod on the block of mass m1? (|→Fnet1| is approximately equal to the compression force in the rod near its right end.)
(c) Suppose that instead of pushing on the right block (mass m1), you pull to the left on the left block (mass m3) with a constant force of magnitude F. Draw a diagram illustrating this situation. Now what is the vector force Frei exerted by the rod on the block of mass m3?
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