physics

posted by .

A desk weighing 80 N rests on the floor. The coefficient of friction between the floor and the desk is 0.25. What is the frictional force between yhe desk and the surface of the floor?

  • physics -

    The friction force is
    M*g*Uk
    IF the desk is moving. Uk is the kinetic friction coefficent in this case.

    The problem should have told you if the desk is moving, and whether the coefficient of friction is static or kinetic.

    If the desk is not moving, the applied force equals the friction force.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. physics

    Imagine yourself seated on a wheeled desk chair at your desk. Consider friction forces between the chair and the floor to be negligible. However, the friction forces between the desk and the floor are not negligible. When sitting at …
  2. Physics

    In moving a 35.0 kg desk from one side of a classroom to the other, a professor finds that a horizontal force of 300 N is necessary to set the desk in motion, and a force of 185 N is necessary to keep it in motion at a constant speed. …
  3. Physics

    In moving a 35.0 kg desk from one side of a classroom to the other, a professor finds that a horizontal force of 300 N is necessary to set the desk in motion, and a force of 185 N is necessary to keep it in motion at a constant speed. …
  4. physics

    An autographed baseball rolls off of a 1.3 m high desk and strikes the floor 0.74 m away from the desk. The acceleration of gravity is 9.81 m/s2 . How fast was it rolling on the desk before it fell off?
  5. Biomechanics

    If John was pushing a 300 kg desk across the floor with a constant acceleration of 3.5 m/s squared, how much force would he have to apply to the desk to maintain the acceleration, considering the coefficient of kinetic friction is …
  6. PHYSICS

    Example 2: a) A desk has a mass of 68.75 kilograms. If the coefficient of static friction between the desk and the floor is 1.1, what force must be used to move the desk from rest?
  7. Physics

    a student pushes on a desk with a force of 75 N causing it to begin sliding. if the desk weighs 400 N then calculate the coefficient of static friction between the desk and the floor
  8. Physics

    An autographed baseball rolls off of a 1.5m high desk and strikes the floor 0.60m away from the desk. How fast was it rolling on the desk before it fell?
  9. Physics

    In moving a 35kg desk from one side of a room to another, a man finds that a horizontal force of 275N is necessary to set the desk in motion, and a force of 195N is necessary to keep it in motion at a constant speed. What are the coefficients …
  10. Physics

    In moving a 35kg desk from one side of a room to another, a man finds that a horizontal force of 275N is necessary to set the desk in motion, and a force of 195N is necessary to keep it in motion at a constant speed. What are the coefficients …

More Similar Questions