FAQs on Apparent Weight in a Lift

Question 1

1. What is the apparent weight in a lift?

Accepted Answer

Ans. The apparent weight in a lift refers to the perceived weight experienced by an object or person inside a moving lift. It is different from the actual weight due to the acceleration or deceleration of the lift.

Question 2

2. How does the apparent weight change in a lift?

Accepted Answer

Ans. The apparent weight in a lift changes depending on the direction of the lift's acceleration. When the lift accelerates upwards, the apparent weight increases, making the object or person feel heavier. Conversely, when the lift accelerates downwards or decelerates, the apparent weight decreases, making the object or person feel lighter.

Question 3

3. Why does the apparent weight change in a lift?

Accepted Answer

Ans. The apparent weight changes in a lift due to the effects of acceleration. According to Newton's second law of motion, when a lift accelerates upwards, the force exerted by the floor of the lift on the object or person increases, resulting in an apparent weight higher than the actual weight. On the other hand, when the lift accelerates downwards or decelerates, the force exerted by the floor decreases, leading to an apparent weight lower than the actual weight.

Question 4

4. How does the apparent weight differ from the actual weight?

Accepted Answer

Ans. The apparent weight differs from the actual weight because it takes into account the acceleration or deceleration of the lift. While the actual weight remains constant, the apparent weight can change depending on the lift's motion. For example, if a person weighs 70 kg, their actual weight will always be 70 kg, but their apparent weight may vary if they are in a lift that is accelerating or decelerating.

Question 5

5. Can the apparent weight ever be zero in a lift?

Accepted Answer

Ans. Yes, the apparent weight can be zero in a lift under specific circumstances. When the lift is in free fall, with no upward or downward acceleration, the apparent weight becomes zero. This occurs because the lift and everything inside it, including objects or persons, are in a state of weightlessness due to the absence of any external force. However, this scenario is highly unlikely in normal lift operations.

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