A monkey sits on the pan of a spring scale. The reading of the spring scale will be maximum when the elevator is kept in an elevator
Correct answer: B. accelerate downward
- A. is stationary
- B. accelerate downward
- C. Cable brakes and it falls freely towards the earth
- D. accelerates upward
Explanation
The reading of the spring scale will be maximum when the elevator accelerates downwards. This is because the apparent weight of the monkey is the sum of its actual weight and the force due to the acceleration, and the apparent weight is maximum when the elevator accelerates downward
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About Weightlessness and Artificial Gravity
Weightlessness means the apparent weight or supporting force on an object is zero, as in free fall or an orbiting spacecraft, not that gravity has disappeared. Artificial gravity is produced by centripetal acceleration, usually through rotation. Questions compare gravitational force, normal reaction, orbital motion and the sensation of weight.
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