Work Energy And Power Question 177

Question: A body of mass m accelerates uniformly from rest to v1 in time t1 . As a function of time t, the instantaneous power delivered to the body is [AIEEE 2004]

Options:

A) mv1tt1

B) mv12tt1

C) mv1t2t1

D) mv12tt12

Show Answer

Answer:

Correct Answer: D

Solution:

P=F.v

=ma×at

=ma2t [as u = 0] =m(v1t1)2t=mv12tt12

[As a=v1/t1]



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