Question

Figure shows two industrial spies sliding an initially stationary 225 kg floor safe a displacement d
of magnitude 9.5 m. The push F1 of spy 001 is 12 N at an angle of 40 degrees downward from the
horizontal, the pull F2 of the spy 002 is 10 N at 50 degrees above the horizontal. The magnitudes
and directions of these forces do not change as the safe moves, and the floor and safe make
frictionless contact.
(a) What is the net work done on the safe by forces F1 and F2 during the displacement d?
(b) During the displacement, what is the work Wg done on the safe by the gravitational force Fg
and what is the work WN done on the safe by the normal force FN from the floor?

Answer 1