If the tension in the cable supporting an elevator is equal to the weight of the elevator, the elevator may be

Options

A. going up with unifrom speed
B. going down with unifrom speed
C. going up with increasing speed
D. going down with increasing speed

Answer

a,b

Explanation

Tension `=R =m (g +-a)` When `R = mg, a = 0` speed must be unifrom If may be upwards or downwards .