1. A 50N force, parallel to an incline's surface, pushes a 19.7kg crate 5m along the 15degree incline at a constant velocity.

a. How much work is done by the applied force?

b. How much work is one by gravity?

c. How much total, (net), work is done?

2. A 50 kg sack is pushed from rest by an 180 N force across a floor with u=.3.

a. How much work is done pushing the sack 20m?

b. How much work is done by friction?

c. What is the net force and how much work does it do?

d. How much total work is done?

3. An 80kg log is pushed 2 m along an icy road by a 200N force. The opposing coefficient of friction is .051.

a. How much work is done by the 200N force?

b. How much work is done by friction?

c. What is the net work done on the log?

d. What is the log's acceleration?