Question

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. remain unchanged
D. none of these

Answer 1

Correct Answer - B
Due to acceleration in downward direction upthrust decreases from `rho_omega V g` to `rho_omega V(g -a)`, therefore spring force decreases i.e., length of spring decreases.
.