Question

During a game of pool, a cue ball travels to the left with 70 N of force and collides with the four ball moving with a force of 50 N to the right. If you assign a negative value to the force moving to the right, what is the net force of this system?(1 point)
Responses

120 N
120 N

20 N
20 N

-20 N
-20 N

20 m/s2

Answer 1

To calculate the net force of the system, you need to consider the direction of the forces based on your assignment of negative value to the force moving to the right.

1. The cue ball travels to the left with a force of 70 N (positive).
2. The four ball moves to the right with a force of 50 N (negative).

Now, you can express the forces:

- Cue ball force = +70 N
- Four ball force = -50 N

To find the net force, you sum these two forces:

\[
\text{Net force} = 70 N + (-50 N) = 70 N - 50 N = 20 N
\]

Therefore, the net force of the system is **20 N**.