A man weighing 70 kg is coming down in a lift. If the cable of the lift breaks suddenly, the weight of the man would become

examrobotsa's picture

Submitted by examrobotsa on

Q: 59 (NDA-I/2016)
A man “weighing 70 kg is coming down in a lift. If the cable of the lift breaks suddenly, the weight of the man would become

question_subject: 

Science

question_exam: 

NDA-I

stats: 

0,9,9,5,1,3,9

keywords: 

{'lift': [0, 0, 0, 2], 'weight': [0, 0, 1, 1], 'lift breaks': [0, 0, 0, 1], 'kg': [0, 1, 9, 24], 'cable': [0, 0, 0, 3], 'zero': [0, 1, 0, 5]}

When a person is in a lift, their weight is determined by the force of gravity acting on their body. In this case, the man`s weight is 70 kg. However, if the cable of the lift suddenly breaks, the lift will no longer be affected by the force of gravity.

When the cable breaks, the lift will plummet downwards due to the force of gravity. At this moment, the man inside the lift will experience a sensation of weightlessness. This is because both the man and the lift are freely falling towards the ground, and there is no contact force between them.

In this state of free fall, the man`s weight is effectively zero. The force of gravity is still acting on him, but since there is no opposing force (such as the lift floor pushing up on him), he no longer has a normal contact force acting on his body.

Therefore, option 4, "Zero", is the correct answer. The man`s weight would become zero in the event of a sudden cable break in the lift.