physics

posted by .

a 1.4 kg block slides across a rough surface such that it slows down with an acceleration of 1.25 m/s2. What is the coefficient of kinetic frisction between the block and the surface?

  • physics -

    I assume that the surface is horizontal. The deceleration rate is -F/M. So, the friction force is
    a = -1.4/1.25 = -1.2 Newtons

    The coefficient of sliding friction is muk = F/(M*g) = 1.2/(1.4*9.8) = ?

  • physics -

    Given: m= 1.4 kg
    A= -1.25 m/s2

    µk=Kinetic force/ Normal Force

    Normal Force= 1.4*9.81(gravity) = 13.72 N

    Kinetic force = net force
    net force = ma = 1.4(-1.25) = -1.75

    µk= -1.75/13.72 = -0.13

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. physics

    A 1.39-kg block slides across a rough surface such that it slows down with an acceleration of 1.43 m/s2. What is the coefficient of kinetic friction between the block and the surface?
  2. physics

    A 1.4-kg block slides across a rough surface such that it slows down with an accerleration of 1.2 m/s2. What is the coefficient of kinetic friction between the block and the surface?
  3. PHYSICS

    A 50KG BLOCK IS BEING PULLED BY a 200-N FORCE ON A HORZONTAL ROUGH SURFACE AS SHOWN IN DIAGRAM.IF THE COEFFICIENT OF KINETIC FRICTION BETWEEN THE BLOCK AND THE SURFACE IS 0.3. FIND THE ACCELERATION OF THE BLOCK
  4. Physics

    A 4 kg block slides down a rough inclined plane inclined at 30° with the horizontal. Determine the coefficient of kinetic friction between the block and the surface if the block has an acceleration of 1.2 m/s2.
  5. Physics

    A 4 kg block slides down a rough inclined plane inclined at 30° with the horizontal. Determine the coefficient of kinetic friction between the block and the surface if the block has an acceleration of 1.2 m/s2.
  6. Physics

    A 1.31-kg block slides across a rough surface such that it slows down with an acceleration of 1.39 m/s2. What is the coefficient of kinetic friction between the block and the surface?
  7. Physics

    A 1.31-kg block slides across a rough surface such that it slows down with an acceleration of 1.39 m/s2. What is the coefficient of kinetic friction between the block and the surface?
  8. physics

    An block of mass m , starting from rest, slides down an inclined plane of length L and angle θ with respect to the horizontal. The coefficient of kinetic friction between the block and the inclined surface is μ1 . At the …
  9. physics

    An block of mass m , starting from rest, slides down an inclined plane of length L and angle θ with respect to the horizontal. The coefficient of kinetic friction between the block and the inclined surface is μ1 . At the …
  10. Physics

    A bullet with a velocity of 200 m/s is shot at a 2-kg block resting on a horizontal frictionless surface. The bullet imbeds in the block and the bullet-block system slides across the surface with a speed of 5 m/s. A) what is the mass …

More Similar Questions