Constant horizontal force and friction

In summary, the homework problem involves a 50 kg object being pushed across a floor by a constant horizontal force of 200 N. The question asks for the force of friction, which can be calculated using the equation Ffr = coeff*Fn. However, the coefficient of friction is not given, so an assumption must be made in order to solve the problem. Assuming that the object is moving at a constant velocity, the coefficient of friction can be solved for using the given answer of 200 N. However, it is noted that the problem is incomplete as it does not specify the velocity of the object.
  • #1
rasen58
71
2

Homework Statement


A 50 kg is pushed across a floor by a constant horizontal force of 200 N. What is the force of friction?

Homework Equations


Ffr = coeff*Fn

The Attempt at a Solution


I'm not sure how to find it as I don't know the coefficient.
The answer says the answer is 200 N, but I don't know why it's equal to the applied force. The problem didn't say it was being moved at a constant velocity, it only has a constant applied force.
 
Physics news on Phys.org
  • #2
Check the problem statement for any other information. You feel it's incomplete as it stands, and it is incomplete as it stands.
 
  • #3
Bystander said:
Check the problem statement for any other information. You feel it's incomplete as it stands, and it is incomplete as it stands.

Is the problem written correctly and completely or is there some missing parts !??
 
  • #4
That's all that was given. I guess whoever wrote the problem wrote it incompletely.
 
  • #5
Solve it for the coefficient of friction necessary for constant velocity, and include an explanation that you're making an assumption based on the given answer.
 

What is a constant horizontal force?

A constant horizontal force is a force that is applied to an object in a horizontal direction and remains constant in magnitude and direction. It does not change in strength or angle, and it continues to act on the object until it is stopped or another force is applied.

How does a constant horizontal force affect an object's motion?

A constant horizontal force will cause an object to accelerate in the direction of the force. The larger the force, the greater the acceleration will be. If the force is applied in the same direction as the object's motion, it will speed up. If the force is applied in the opposite direction, it will slow down or come to a stop.

What is friction and how does it relate to a constant horizontal force?

Friction is a force that opposes motion between two surfaces that are in contact. When a constant horizontal force is applied to an object, friction can act in the opposite direction, causing the object to slow down or come to a stop. The amount of friction depends on the roughness of the surfaces and the force pushing them together.

How can you calculate the net force on an object experiencing a constant horizontal force and friction?

To calculate the net force on an object, you need to consider the forces acting on the object. In the case of a constant horizontal force and friction, the net force would be the difference between the applied force and the force of friction. If the applied force is greater than the force of friction, the object will accelerate in the direction of the applied force. If the applied force is equal to the force of friction, the object will move at a constant speed. If the applied force is less than the force of friction, the object will decelerate.

How can friction be reduced in order to maintain a constant horizontal force on an object?

Friction can be reduced by using smoother surfaces or by adding a lubricant between the surfaces. In some cases, the force of friction can be completely eliminated by using wheels or rollers to reduce the contact between the two surfaces. This allows the object to maintain a constant horizontal force without being impeded by friction.

Similar threads

  • Introductory Physics Homework Help
Replies
17
Views
614
  • Introductory Physics Homework Help
Replies
13
Views
963
  • Introductory Physics Homework Help
Replies
7
Views
349
  • Introductory Physics Homework Help
Replies
7
Views
420
  • Introductory Physics Homework Help
2
Replies
41
Views
2K
  • Introductory Physics Homework Help
Replies
2
Views
653
Replies
29
Views
1K
  • Introductory Physics Homework Help
Replies
2
Views
216
Replies
5
Views
177
  • Introductory Physics Homework Help
Replies
24
Views
2K
Back
Top