Answer:
The magnitude of the frictional force is 50 newtons.
Explanation:
The frictional force can be found as follows:
[tex] \Sigma F = ma [/tex]
[tex] F - F_{\mu} = ma [/tex]
Where:
F: is the applied force = 50 N
[tex]F_{\mu}[/tex]: is the frictional force
m: is the box's mass
a: is the acceleration
Since the box is pulled at a constant velocity, a = 0, so:
[tex] F - F_{\mu} = 0 [/tex]
[tex] F = F_{\mu} = 50 N [/tex]
Therefore, the magnitude of the frictional force is equal to the applied force, that is to say, 50 newtons.
I hope it helps you!
