Question

A man is standing on a weighing machine placed in a lift, when stationary, his weight is recorded as 40 kg. If the lift is accelerated upwards with an acceleration of $2m/s^{2}$, then the weight recorded in the machine will be $(g = 10m/s^{2})$

• A. 32 kg
• B. 40 kg
• C. 42 kg
• D. 48 kg

Answer 1

Answer: (D)

48 kg

Answer 2

$R = m(g + a) = 40(10 + 2)$ $= 480N$ or $48kg$