Question 4
Newton's Laws and MomentumA man standing on a lift that is descending does not feel any weight because
- A.there is no reaction from the floor of the lift
- B.there is no gravitational pull on the man in the lift
- C.the inside of the lift is airtight
- D.the lift is in vacuum.
Show the answer and explanation
Answer: A (there is no reaction from the floor of the lift)
Explanation
We feel our weight through the push (reaction) of the floor. If the lift falls freely, the floor pushes on the man with zero force, so he feels weightless even though gravity still acts.