Laws Of Motion Question 231

Question: A boy whose mass is 50kg stands on a spring balance inside a lift. The lift starts to ascent with an acceleration of 2ms2. The reading of the machine or balance (g=10ms2) is [Kerala PET 2002]

Options:

A) 50kg

B) Zero

C) 49kg

D) 60kg

Show Answer

Answer:

Correct Answer: D

Solution:

R=m(g+a)=50×(10+2)=600N=60kgwt



NCERT Chapter Video Solution

Dual Pane