Question

the free-body diagram below shows the forces acting on a bicycle as the rider pedals to the right. The bicycle has a weight of 800 N and a pedaling force of 250 N. As it moves it encounters 75 N of air resistance. What is the net force acting on the bicycle in the x-direction?
A. 550 N to the right
B. 1125 N to the right
C. 325 N to the right
D. 175 N to the right

Answer 1

draw it first

Answer 2

the driving force and the resistance force, are like in the subsequent drawing:

Answer 3

so the resultant force is represented by a horizontal vector directed to right, and whose magnitude is:
250-75=...newtons