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Q.

A particle of mass 1 kg moves from rest along a straight line by the action of a force F which varies with the distance x as shown in the F–x graph.

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a

Maximum kinetic energy of the particle is 25 J

b

Maximum rate of change in kinetic energy is 1040 W

c

There will be no power delivered by the particle at x = 3 and 6m

d

Total work done by the particle is 5 J.

answer is A, C, D.

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Detailed Solution

1) w=10×2+12×1×10

w=20+5=25 J

3) w=10×2+12×1×10−12×2×20−12×1×20

=20+5−20−10=−5 J

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