Question

A pendulum bob of mass 50 g is suspended from the ceiling of an elevator. Find the tension in the string if the elevator (a) goes up with acceleration 1.2 m/s ², (b) goes up with deceleration 1.2 m/s ², (c) goes up with uniform velocity, (d) goes down with acceleration 1.2 m/s ², (e) goes down with deceleration 1.2 m/s ² and (f) goes down with uniform velocity.

Answer 1

a) The tension in the string is found out for the different conditions from the free body diagram as shown below.