Circular MotionHard
Question
A car is moving in a circular horizontal track of radius 10 m with a constant speed of 10 m/s. A plumb bob is suspended from the roof of the car by a light rigid rod. The angle by the rod with the vertical is (Take g = 10 m/s2)
Options
A.zero
B.30o
C.45o
D.60o
Solution
FBD of bob is T sin θ =
and T cos θ = mg
∴ tan θ =
tan θ = 1
or θ = 45o.
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