Q. A cork is submerged in water by a spring attached to the bottom of a bowl. When the bowl is kept in an elevator moving with acceleration downwards, the length of spring
A) Increases
B) Decreases
C) Remains unchanged
D) None of these
Explanation
(b) Effective weight $W^{'} = m(g - a)$ which is less than actual weight $mg,$ so the length of spring decreases
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.