A 160 N crate slides with constant speed a distance of 5.0 m downward along a rough
slope that makes an angle of 30° with the horizontal.
A. Draw a free body diagram to show all the forces applied to the crate on the slope.
B. What is the magnitude of each force applied to the crate?
C. What is the work done by each force on the crate while it slides down 5 meters?
D. What is the work done by the net force?
E. In the earth-crate-ramp system, what is the work done by the external forces?
F. What is the change of the gravitational potential energy?
G. According to the law of conservation of energy, what is the increase of the thermal
energy of the system?