First slide

Pseudo force

Question

An object is suspended from a spring balance in a lift. The reading is 240 N when the lift is at rest. If the spring balance reading now changes to 220 N, then the lift is moving

Easy

A

Downward with constant speed
B

Downward with decreasing speed
C

Downward with increasing speed
D

Upward with increasing speed

Solution

Acceleration is to be downward which is possible in option (c).

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