Question

a car is moving in a circular horizontal track of radius 10m with a constant speen of 10 ms -1 a plumb bob is suspended from the roof of the car by the string of the length 1m the angle made by the string with vertical is g=10 m/s2
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Answer 1

Explanation:

We know that,

Tsinθ=rmv2    [centripetal] ⟶(i)

Tcosθ=mg⟶(ii)  (force)

from (i) and (ii))

TcosθTsinθ=rmv2×mg1

tanθ=rgv2

Given that, radius =10 m

                   velocity =10 m/s

                              g=10m/s2

tanθ=10×10102=1⇒θ=450