c. Suppose the incline in part b is now placed on a frictionless table. i. Is th

Question

c. Suppose the incline in part b is now placed on a frictionless table. i. Is the net force on the block always zero? Explain. ii. Is the net force on the incline always zero? Explain. iii. Is the net force on the block-incline system always zero? Explain. iv. Is the momentum of the block conserved? Explain. v. Is the momentum of the incline conserved? Explain. vi. Is the momentum of the block-incline system conserved. Explain. d. Two blocks. A and B. are connected by a massless and inextensible string. Their masses are m_A = 200g and m_B = 400 g. The blocks are released from rest. The pulley has negligible mass. Let S represent the system of blocks A, B. the string, and the pulley. i. Is the net force on block A always zero? Explain. Is the net force on system S always zero? Explain. iii. Is the momentum of block A conserved? Explain. iv. Is the momentum of system S conserved? Explain.

Explanation / Answer

From the given question,

i. The incline will exert force on block. so,net force on block is not zero.

ii. the block will exert equal and opposite force on incline, so net force on incline is not zero.

iii. Since the force exerted by block on incline is equal and opposite to force exerted by incline on block, the net force on block incline system is zero.

iv.Since the block starts sliding down the plane, its momentum is not conserved.

v.Since the incline starts moving towards left, its momentum is not conserved.

vi. Since the momentum of block and incline is equal and opposite, the net momentum of block - incline system is zero. Hence the momentum of block incline system is conserved.

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