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Class 11 NEET Physics Laws of Motion Questions
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Question : 32
Total: 75
A car of mass m is moving on a level circular Pack of radius R. If
µ
s
represents the static friction between the road any tyres of the car, the maximum speed of the car in circular motion is given by
(2012 Mains)
√
µ
s
m
R
g
√
R
g
µ
s
√
m
R
g
1/4
s
√
µ
s
R
g
Validate
Solution:
Force of friction provides the necessary centripetal force.
F
≤
µ
s
N
=
m
v
2
R
,
v
2
≤
µ
s
R
N
m
v
2
≤
√
µ
s
R
g
[∵N = mg]
or
v
≤
√
µ
s
R
g
∴ The maximum speed of the car in circular motion is
v
m
a
x
=
√
µ
s
R
g
© examsnet.com
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