Q. A wooden block of mass 1 kg is attached to the hook of a spring balance. The spring balance is then raised with an acceleration of $9.8\ ms^{- 2}$. The apparent weight of the body is
A) 1 kg-wt
B) 2 kg-wt
C) 3 kg-wt
D) 4 kg-wt
Explanation
(b) $R^{'} = m(g + a) = m(g + g)$
$= 2mg$ N = 2$m\ $kg-wt
$= 2$ kg-wt [$\because m = 1$]
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.