A body of mass is kept on a spring balance inside an elevator that is accelerating…

PHYSICS · Single correct · CBSE · Physics · Gravitation · Gravitation

Problem

A body of mass

m

is kept on a spring balance inside an elevator that is accelerating uniformly upward with acceleration

a

. Which one of the following expressions gives the reading

R

shown by the balance? (a)

m(g-a)

(b)

ma

(c)

m(g+a)

(d)

mg