Problem:

A car accelerating at uniform rate has a small ball hung under the roof by a string of length L. What is the angle between the string and the vertical direction when the ball is is steady state? What will be the frequency of oscillation if the ball is set in small oscillation?

Solution:

Steps:

- Specify the chosen reference frame
- Sketch the free body diagram
- Sum the forces along x and along y
- Solve for theta

– Frequency of small oscillation of ball hanging in accelerating car