A pendulum bob of mass 50 g hangs from the ceiling of an elevator. Determine the tension in the string given that the elevator is travelling downward with a uniform velocity.

Step-by-step solution

Mass of the bob, m = 50 g = 0.05 kg Since the elevator is moving downward with a uniform velocity, its acceleration a = 0 . The forces acting on the bob are the tension T in the upward direction and the weight mg in the downward direction. Balancing the forces, we get: T = mg T = 0.05 9.8 T = 0.49 N