Answer:
The tractor applies 1,748.418 N to the plow.
Step-by-step explanation:
Net Force
According to the second Newton's law, the net force exerted by an external agent on an object of mass m is:
Fn=m.a
If the acceleration is zero, then the net force is also zero. That means all forces acting on the mass are balanced.
The tractor drags the m=313 Kg plow at a constant speed, thus the acceleration is zero and so is the net force.
The horizontal forces acting on the plow are:
- The force applied by the tractor Ft
- The friction of the ground Fr
Since both forces are balanced, then:
Ft=Fr
The friction force is calculated as:

Where
is the coefficient of friction between the plow and the ground and N is the normal force. In the situation described, the normal force is equal to the weight of the plow:

The normal force is N=3,067.4 N
The friction force is now calculated:


Thus, the tractor applies 1,748.418 N to the plow.