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Laws of Motion
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Problems on Friction
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The acceleration of a body moving up a r
Question
Assertion
The acceleration of a body moving up a rough inclined plane when it is pulled up by a force, depends only on its mass.
Reason
Frictional force acts in the direction of the applied force.
A
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
B
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
C
Assertion is correct but Reason is incorrect
D
Both Assertion and Reason are incorrect
Medium
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Solution
Verified by Toppr
Correct option is D)
The force required to move a body up an inclined plane having coefficient of friction
μ
is given by:
F
=
m
g
(
s
i
n
α
+
μ
c
o
s
α
)
. So the acceleration of the body will be:
a
=
F
/
m
=
g
(
s
i
n
α
+
μ
c
o
s
α
)
which is independent of its mass.
in this case friction acts opposite to the applied force.
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