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Q.

When work done on a particle is positive :
(i) KE increases 
(ii) KE decreases
(iii) KE remains constant 
(iv) momentum increases

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a

(i, iii)

b

(i, ii)

c

(i, iv)

d

(i, ii, iii)

answer is C.

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Detailed Solution

Work done = Change in kinetic energy. Therefore when work done is positive, kinetic energy and as a consequence speed and momentum increases.

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