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Question: A car is moving in a circular horizontal track of radius 10 m with a constant speed of 10 ms<sup>-l<...

A car is moving in a circular horizontal track of radius 10 m with a constant speed of 10 ms-l. A plumb bob is suspended from the roof of car by a light rigid rod of length 1 m. The angle made by rod with the track is

A

Zero

B

300

C

450

D

600

Answer

450

Explanation

Solution

T sin θ = mv2R\frac { \mathrm { mv } ^ { 2 } } { \mathrm { R } }

and T cos θ = mg

∴ tanθ = 1 or θ = 450