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Q.

A body is moved along a straight line by a machine delivering constant power. The distance moved by the body in time 't' is proportional to

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a

t1/2

b

t3/4

c

t3/2

d

t2

answer is C.

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Detailed Solution

P=F×V

=ma×at

=ma2t

This means a2t=Pm=constant

Distance s=12at2

s2=14a2t4=constant.t3

Thus we have  st3/2

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