KCET 2020 Physics Solved Paper

A body undergo one dimensional motion with constant acceleration. So, it will cover a distance in time 't' is
s=ut+

1

2

at2
It is given, body is initially at rest.
so, u=0
Now, s=

1

2

at2 ( ∵ a is constant )
Power delivered is
P=

work‌done

time

=

w

t

=

F×s

t

=

F×s

t

‌‌=

(ma)×( 1 2 at2)

t

‌‌=(

1

2

ma2)t
P∝t
so, power delivered is proportional to 't'