A body is moving unidirectionally under the influence of a source of constant power. Its displacement in 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.10:- A body is moving unidirectionally under the influence of a source of constant power. Its displacement in time t is proportional to
(i) t1/2   (ii) t   (iii) t3/2   (iv) t2

 

Answer:-



As power, P = force × velocity
P = [MLT-2] [LT-1] = [ML2T-3]
As, P = [ML2T-3]
= constant
L2T-3 = constant
or, L2/T3 = constant
L2T3
or, LT3/2

Hence, right choice is (iii) t3/2