An object is hanging by a string from the ceiling of an elevator. The elevator i
ID: 1332003 • Letter: A
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 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 magnitude of the tension in the string is equal to the magnitude of the weight of the object.
The tension in the string is zero.
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 magnitude of the tension in the string is equal to the magnitude of the weight of the object.
The tension in the string is zero.
The magnitude of the tension in the string is less than the magnitude of the weight of the object.
Explanation / Answer
The magnitude of the tension in the string is equal to the magnitude of the weight of the object.
Beacuse, as the elevator is moving with constant speed, the obkect also moves with constant speed.
so, net force acting on the object is zero. Fnety = 0
T - Weght = 0
T = Weight
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