Work, Power and Energy
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Question : 9
Total: 30
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
(a)t
(b)t
(c)t
(d)t 2
(a)
(b)
(c)
(d)
Solution:
Power = F × v
P = m a × a t
P = m a 2 t
∴ P ∝ t
(As m and a are constant)
Option (b) is correct.
(As m and a are constant)
Option (b) is correct.
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