Physics 111 Final exam study guide part 3 with 100% correct answers

A 50-kg crate is pulled 40 m along a horizontal floor by a constant force exerted by a person. The applied force is 100 N, which acts at a 37 degree angle wrt the horizontal. The floor is rough and exerts a frictional force of 50 N. a. Determine the work done by each force acting on the crate. b. Determine the net work done on the crate. correct answersa. -work done by the person - WF = F * x * cos(theta) WF = 100 * 40 * cos(37) WF = 3194.54 J the work done by the applied force is 3194.54 J -work done by frictional force -Wff = ff * x * cos (180) Wff = 50 * 40 * (-1) Wff = -2000 J the work done by the frictional force is -2000 J -work done by gravitational force is 0 b. net work done on crate- Wnet = WF + Wff Wnet = 1194.54 J net work done on the crate is 1194.54 J A car is traveling at 10 m/s. Report answer (a) in m/s.