A pendulum bob of mass 50 gm is hanging from the ceiling of a lift by a light , inextensible string. Choose the correct options ( g = 9.8 `m//s^(2)`)

Options

A. When the lift has an acceleration` (1.2 m//s^(2)) hat(j)` the tension in the string is 0.55 N
B. When the left has a constant velocity `(1.2m//s^(-1)) hat(j)` the tension in the string is 0.49 N
C. When the left has an acceleration `-(1.2 m//s^(-2))hat(j)`, the tension in the string is 0.43 N
D. When the lift has a constant velocity `-(1.2 m//s^(-1))hat(j)` , the tension in the string is 0.55 N

Answer

A, B, C