Question

A 30 N object is on a 2.0 kg wagon as it is being pulled at a constant velocity by a 10.0 N force 20.0 0 above the positive horizontal. Calculate:

a. The normal force acting on the wagon

b. The frictional force acting on the wagon

Answer 1

a)

$$N=W_O+W_W-F\sin{20}$$

$$N=30+(2)(9.8)-10\sin{20}=46\ N$$

b)

$$F_f=F\cos{20}=10\cos{20}=9.4\ N$$