If the crate shown here is moving at a constant speed in a straight line and the force applied is 310 N, what is the magnitude o
f the force of friction?
A.310 N
B.0 N
C.620 N
1 answer:
Answer:

the answer is A.
Explanation:
Using the laws of newton:
∑F = ma
where ∑F is the sumatory of forces acting in the system, m the mass and a the acelertion of the system.
Then, if the block is moving with constant velocity, its aceleration is equal to 0, so:
∑F = m(0)
∑F = 0
It means that:
F -
= 0
where F is the force applied and
is the friction force. Replacing the value of F, we get:
310N -
= 0
Finally, solving for
:

You might be interested in
Every piece of matter begins “Out of this world”
Answer:
C
Explanation:
gravity is a pulling force according to Newton
Answer:
Physiological needs
Explanation:
the first step would be gathering information , and making sure its correct
B because the the organism is changing into another chemical form