Boxes A and B in the figure have masses of 12.0kg and 3.5kg , respectively. The

Question

Boxes A and B in the figure have masses of 12.0kg and 3.5kg , respectively. The two boxes are released from rest.(Figure 1) Part A Use conservation of energy to find the boxes' speed when box B has fallen a distance of 0.50 m. Assume a frictionless upper surface.

Boxes A and B in the figure have masses of 12.0kg and 3.5kg , respectively. The two boxes are released from rest.(Figure 1) Part A Use conservation of energy to find the boxes' speed when box B has fallen a distance of 0.50 m. Assume a frictionless upper surface.

Explanation / Answer

Here both block will move with same velocity as they are connected through string

loss in block B's gravitational potential energy = gain in K.E

3.5*9.8*0.5 = 0.5(3.5+12)*v2

we will get v = 1.48 m/sec

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