75*9.8
since nothing is moving yet, only gravity is involved.
A 75 kg man stands on a spring scale in an elevator. Starting from rest, the elevator ascends, attaining its maximum speed of 1.6 m/s in 1.1 s. It travels with this constant speed for the next 7.2 s, undergoes a uniform
negative acceleration for 2.4 s, and comes to rest.
What does the spring scale register before the elevator starts to move?
The acceleration of gravity is 9.8 m/s^2
1 answer
1 answer