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Can someone give me some Physics help?
A 50 kg mass is pulled a distance of 20 m (i-hat) at a constant velocity by a force of 400 N at an angle of 60 degrees. The coefficient of kinetic friction between the mass and the floor is 0.408.
A. What is the work done by the applied force?
B. What is the work done by the friction force?
C. What is the work done by the gravitational force?
D. What is the work done by the normal force?
1 Answer
- FiremanLv 71 decade agoFavorite Answer
A. W = F.s = F x s x cosθ = 500 x 20 x cos60* = 5000 J
B. By F(net) = F(applied) - F(friction)
=>As v = constant=>a = 0 =>F(net) = 0
=>F(applied) = F(friction)
=>W(by applied force) = W(by friction)
=>W(friction) = 5000 J
C. 0
D. 0
