MPB 8115 Lecture 17: 5a

A truck is pulling a car. What is the magnitude of the force exerted by the truck on the car?

A) T

B) 0

C) T - F_k

D) F_k

FN +mg +fk +F=0

FN is the normal force,mg is mass and gravitational acceleration which equals toweight, and F is force. Sowhat is fk? Blah I can't believe I don't know this.

The two ropes shown in the bird's-eye view of the figure beloware used to drag a crate 3.8 m across the floor, with fk = 470 N,T1 = 355.11 N and θ = 33°. How much work is done by each of thethree forces?