Question

A person standing on a spring balance inside a stationary lift measures 60 kg. The weight of that person if the lift descends with uniform downward acceleration of 1.8 m/s² will be ______ N. [g = 10 m/s²]

विकल्प

• 192

• 294

• 393

• 492

Answer 1

A person standing on a spring balance inside a stationary lift measures 60 kg. The weight of that person if the lift descends with uniform downward acceleration of 1.8 m/s² will be 492 N. [g = 10 m/s²]

Explanation:

Mass of the person, M = 60 kg

Tension in the lift's rope as it moves downward with acceleration a,

T = M(g - a)

= 60 (10 - 1.8)

= 492 N