Practice
1. Complete the free-body diagram below for an object that is being pulled by a 55 N force to the right with
and is not moving. Fg = 50 N. Calculate the following:
a) normal force
b) force of friction
2. Complete the free-body diagram below for an object that is being pulled with a constant velocity by a 40
N force that makes a 30 angle with the horizontal. Fg = 40 N. Find the following:
a) force of friction
b) normal force
c) repeat a) and b) if the applied force makes a 30 angle below the horizontal, instead of above.
3. Complete a free-body diagram to illustrate the following: an object (Fg = 150 N) is sliding down an incline
that makes a 40 angle with the horizontal.