Question

A van accelerates uniformly down an inclined hill going from rest to 30 m/s in 6 s. During the acceleration, a toy of mass m = 0.1 kg hangs by a light string from the van's ceiling. The acceleration is such that string remains perpendicular to the ceiling. (Take g = 10 $m/s^2$).
Choose the correct statement(s)

• A. The friction force on van is $0$
• B. The friction force on van is $mgcos\theta$
• C. The friction force on van is $mgsin\theta$
• D. The friction force on van is $mgtan\theta$

Answer 1

The correct option is C The friction force on van is $mgsin\theta$

The friction force on van is $mgsin\theta$

Hence,

option $\left(C\right)$ is correct answer.