Q. The mass of man when standing on lift is 60 kg. What is the weight when he is standing on lift which is moving upwards with acceleration $\ 4.9{\ ms}^{- 2}$ ?
A) 882 kg
B) 600 N
C) 306 N
D) Zero
Explanation
(a) In case of upward motion
$F = m(g + a)$
$= 60(9.8 + 4.9)$
$= 60(14.7)$
$= 882\ $kg
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.