A chair lift holding a 100 kg man rises 5 meters in height in 10 second time period. Ignore the weight of the chair and related machinery and answer the following: What is the weight (force exerted by his mass) of the man, in Newtons?

Answer 1

It depends upon whether the velocity is constant during the 10 seconds or if the skier started from a standstill.

Weight always equals Mg. There can be addional or reduced force on the seat if the chair is accelerating or decelerating. Most chair lifts maintain a constant velocity.