A body is initially at rest. It undergoes one-dimensional motion with constant acceleration. The power delivered to it at time t is proportional to (i) t1/2 (ii) t (iii) t3/2 (iv) t2 | Learn NCERT solution | Education portal Class 11 Physics | Study online Unit-6 Work, Energy And Power



Q.9:- A body is initially at rest. It undergoes one-dimensional motion with constant acceleration. The power delivered to it at time t is proportional to
(i) t1/2   (ii) t   (iii) t3/2   (iv) t2

 

Answer:-



From,
v = u + at
v = 0 + at = at
As power, P = F × v
P = (ma) × at = ma2t
As m and a are constants, therefore, P ∝ t
Hence, right choice is (ii) t