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Question
Physics
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
Q. 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
2069
186
KCET
KCET 2020
Work, Energy and Power
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A
t
1/2
21%
B
t
39%
C
t
3/2
16%
D
t
2
23%
Solution:
As we know,
P
=
F
v
where,
P
is the power,
F
is the force and
v
is the velocity.
or,
P
=
mav
or,
P
=
m
a
2
t
or,
P
∝
t