You weigh an object by hanging it from a rope which has a spring-scale that reads the amount of tension. You do this on a moving elevator. Under which of the following circumstances would you expect the scale to read more than the actual weight.

(A) Elevator moving upward at constant velocity.
(B) Elevator moving upward and slowing to a stop.
(C) Elevator moving downward at constant velocity.
(D) Elevator moving downward and slowing to a stop.


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You weigh an object by hanging it from a rope which has a spring-scale that reads the amount of tension. You do this on a moving elevator. Under which of the following circumstances would you expect the scale to read more than the actual weight.

(A) Elevator moving upward at constant velocity. --- No.

The object is then in equilbrium ---
Total force on it is zero. Tension equals weight.

Try again.
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You weigh an object by hanging it from a rope which has a spring-scale that reads the amount of tension. You do this on a moving elevator. Under which of the following circumstances would you expect the scale to read more than the actual weight.

(B) Elevator moving upward and slowing to a stop.
No. The object has a downward acceleration and must
experience a downward total force.
The tension must then be less than the weight.

Try again.
Questions --- What this question is about
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You weigh an object by hanging it from a rope which has a spring-scale that reads the amount of tension. You do this on a moving elevator. Under which of the following circumstances would you expect the scale to read more than the actual weight.

(C) Elevator moving downward at constant velocity.

No. The object is then in equilbrium ---
Total force on it is zero. Tension equals weight.

Try again.
Questions --- What this question is about
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You weigh an object by hanging it from a rope which has a spring-scale that reads the amount of tension. You do this on a moving elevator. Under which of the following circumstances would you expect the scale to read more than the actual weight.

(D) Elevator moving downward and slowing to a stop.
Yes. The acceleration of the object is upward,
so it must feel an upward total force.
The tension must exceed the weight.

Check the other answers.
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