Problem 3.1:
An elevator must lift 1000 kg a distance of 100 m at a velocity of 4 m/s. What
is the average power the elevator exerts during this trip?
[Solution]
Problem 3.2:
An object in free fall is said to have reached terminal velocity if the
air resistance becomes strong enough to counteract all gravitational
acceleration, causing the object to fall at a constant speed. The exact value of
the terminal velocity varies according to the shape of the object, but can be
estimated for many objects at 100 m/s. When a 10 kg object has reached terminal
velocity, how much power does the air resistance exert on the object?
[Solution]
Problem 3.3:
Calculus based problem Derive, using the equation
P = 
, an
expression for the power exerted by gravity on an object that is in free fall.
[Solution]
