constant speed means no acceleration
F = m g = 608 N
W = force * distance = 608*4*5
= 12,164 Joules
same but force opposite to motion for gravity -12,164
signs reverse if going down
62kg person in an elevator is moving up at a constant speed of 4.0m/s for 5.0s
a) calculate the work done by the normal force on the person.
b) calculate the work done by the force of gravity on the person .
c) How would your answer change if the elevator were moving down at 4.0m/s for 5.0s ?!
I am getting 6082.2 instead of 1200J for both help please
1 answer