Question

A train moving along a horizontal track. A pendulum suspended from the roof makes an angle of 4° with the vertical, The acceleration of the train is ______ ms^–2 (g = 10 ms^–2) 

(A) 0.6 

(B) 0.7 

(C) 0.5 

(D) 0.2

Answer 1

Correct option: (B) 0.7

Explanation:

mg sin θ = ma 

a = g sin θ 

θ = 4°, 

a = 10 sin 4° 

= 10 × 0.069 

a = 0.7 m/s²