Q.

A particle is moving in a conservative force field from A to point B and no other force is acting. UAandUB are the potential energies of the particle at points A and B and WC is the positive work done in the process of taking the particle from A to B.

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a

UA>UB

b

UB>UA

c

WC=UB

d

WC=UA+UB

answer is C.

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Detailed Solution

UA>UB 

Change in kinetic energy or potential energy is work done. Since it's positive the only possibility UA>UB

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A particle is moving in a conservative force field from A to point B and no other force is acting. UA and UB are the potential energies of the particle at points A and B and WC is the positive work done in the process of taking the particle from A to B.