A body of mass 2kg is suspended from the ceiling of a lift with a light inextensible string. lf the lift moves upwards with acceleration of 2ms−². Calculate the magnitude of the tension in the string (g = 10ms−²)

A. 24N
B. 20N
C. 16N
D. 4N
E. 0N

Correct Answer:

Option C – 16N

Explanation

T + ma = mg
T = mg – ma = 2 x 10 – 2 x 2 = 16N