Question

An object is hanging by a string from the ceiling of an elevator. The elevator is moving upward with a constant speed. What is the magnitude of the tension in the string?

The magnitude of the tension in the string is equal to the magnitude of the weight of the object.
The magnitude of the tension in the string is less than the magnitude of the weight of the object.
The tension in the string cannot be determined without knowing the speed of the elevator.
The magnitude of the tension in the string is greater than the magnitude of the weight of the object.
The tension in the string is zero.

Answer 1

A mass is hanging by a string from the ceiling of an elevator. The elevator is moving downward and is speeding up. What is the tension in the string?

When the elevator is at rest, the tension in the string = weight of object
When the elevator is moving at a constant velocity up or down, the tension in the string = weight of object

The weight of the object is pulling down on the string.

When you are in an elevator at rest, you feel normal! Normal on the earth means you feel the floor under your feet, and the force that the floor is exerting on your feet = your weight.

When the elevator is moving upward and is speeding up, you feel the floor exerting a greater force on your feet.

When the elevator is moving downward and is speeding up, you feel the floor exerting a lesser force on your feet. If the elevator accelerated at 9.8 m/s^2 downward, you would not feel any force on your feet.

If you were hanging from a rope attached to the ceiling of the elevator and the elevator is moving downward and is speeding up, the ceiling is accelerating toward you, causing the tension in the rope to decrease.

A mass is hanging by a string from the ceiling of an elevator. The elevator is moving downward and is speeding up. So the tension in the string has decreased, A.

If the downward acceleration of the elevator = g, 9.8 m/s^2, the tension in the string will equal 0 N

Answer 2

The magnitude of the tension in the string is equal to the magnitude of the weight of the object.

Answer 3

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