Question

Question 9 of 10
2 Points
The free-body diagram below shows the forces acting on a bicycle as the
rider pedals to the right. The vectors are not drawn to scale. The bicycle has a
weight of 1000 N and a pedaling force of 400 N. As it moves, it encounters
300 N of air resistance. What is the net force acting on the bicycle in the x-
direction?
Air resistance
Pedaling force

Answer 1

The net force in the x-direction is 100 N forward

Explanation:

To answer the question, we just need to care about the forces acting along the x-direction.

Along this direction, we have:

- The pedaling force, forward, of magnitude F = 400 N

- The air resistance, acting backward, of magnitude R = 300 N

Taking forward as positive direction, this means that we can rewrite the two forces as

F = 400 N

R = -300 N

Therefore, the net force in the x-direction is

$\sum F = F + R = (400 N) + (-300 N)=+100 N$

And the positive sign means its direction is forward.

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Answer 2

Answer:

100 N to the right

Explanation: