A body of mass m is attached to a spring balance which is attached to the ceiling of an elevator. If the elevator moves up with a certain acceleration, the apparent weight of the body will be
Correct answer: D. All of these
- A. m(g+a)
- B. g(m+ma/g )
- C. a(m+mg/a )
- D. All of these
Explanation
The apparent weight of the body in an elevator depends on the acceleration of the elevator and the gravitational acceleration.Upward acceleration: The apparent weight is m(g + a).Downward acceleration: The apparent weight is m(g - a).
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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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