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NCERT Exemplar Solutions Class 9 Science Solutions for Work and Energy - Exercise in Chapter 11 - Work and Energy
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A car is accelerated on a leveled road and attains a velocity 4 times of its initial velocity. In this process the potential energy of the car
(a) does not change
(b) becomes twice to that of initial
(c) becomes 4 times that of initial
(d) becomes 16 times that of initial
Answer:
The answer is (a) does not change
Explanation:
Potential energy is the product of height, mass, and gravity. Hence height is a factor in determining potential energy. Here the height does not change hence potential energy of the car does not change.
Video transcript
"hello everyone welcome to lido learning
i am gurpreet your science tutor
today's question is a car is accelerated
on a leveled road and attains a velocity
four times of its initial velocity
in this process the potential energy of
the car
a does not change b
becomes twice to that of initial c
becomes four times that of the initial
and
d becomes 16 times that of the initial
so here four options have been given to
you and we have to find out
the correct option
since potential energy
is the product
of height
mass and gravity
hence height is
a factor
that determines
potential
energy okay
so here the height does not
change hence the potential energy will
also not change
so the correct option for this
is option a the potential
energy will not change
for more such videos please subscribe
leader learning
and for any doubts drop a comment thank
you"
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