Ask questions and get helpful responses.
Ask a New Question
  1. Questions

physics

A 5-kg box is pushed across a horizontal floor by a 20-N force that is angled 30 degrees
below the horizontal. What is the coefficient of kinetic friction between the box and the floor if
the box is pushed at a constant speed?

  1. 👍
  2. 👎
  3. 👁
  4. ℹ️
  5. 🚩
chelsea

  1. ma=Fcosα-F(fr)
    ma=0
    F(fr) = μmg
    Fcosα= μmg
    μ=Fcosα/mg =
    =20•cos30/5•9.8=0.35

    1. 👍
    2. 👎
    3. ℹ️
    4. 🚩
    Elena

Respond to this Question

First Name

Your Response

Similar Questions

  1. physics

    A 50-kg box is being pushed a distance of 6.4 m across the floor by a force P with arrow whose magnitude is 154 N. The force P with arrow is parallel to the displacement of the box. The coefficient of kinetic friction is 0.24.

  2. Physics: Energy

    Alisha starts pulling (from rest) a box full of books on a horizontal floor. She has tied the rope to the box, the rope makes an angle of 40.0° relative to the floor. She pulls with a force F of magnitude 120N. The total mass of

  3. Physics

    A 115.0 kg box is pushed by a horizontal force F at constant speed up a frictionless ramp which makes an angle of 46.0 deg with the horizontal. Find the magnitude of the applied force F. what is the magnitude of the normal force

  4. Physics

    A 60 kg is pushed 12m across a horizontal floor by a horizontal force of 200N. The coefficient of kinetic friction is 0.3. How much work went into overcoming friction and how much work went into accelerating the box.

  1. physics

    A 5kg box on a horizontal table is pushed by a horizontal force of 15N. If the coefficient of friction is 0.4, will the box move? what is the smallest force that could make the box slide along the table?

  2. Physics

    A 25 kg box is along a horizontal floor and a force of 400 N pushes the box with an angle of 50 deg with the horizontal. Starting from rest, the box achieves a velocity of 2 m/s in a time of 4 seconds. Find the coefficient of

  3. Physics help!

    A box of books weighing 323 N is shoved across the floor by a force of 477 N exerted downward at an angle of 35° below the horizontal. (a) If μk between the box and the floor is 0.51, how long does it take to move the box 4.80 m

  4. Physics

    Alisha starts pulling (from rest) a box full of books on a horizontal floor. She has tied the rope to the box, the rope makes an angle of 40.0° relative to the floor. She pulls with a force F of magnitude 120N. The total mass of

  1. physics

    A force of 100N pulls a box of weight 200N along a smooth horizontal surface makes 45(degree) to the floor . Calculate the work done by the force. A- in moving the box a distance of 25m along the horizontal. B- against gravity. C-

  2. Physics

    A 39.0 kg box initially at rest is pushed 4.50 m along a rough, horizontal floor with a constant applied horizontal force of 135 N. If the coefficient of friction between box and floor is 0.300, find the following. (a) the work

  3. Physic

    A 3.5 kg block is pushed along a horizontal floor by a force of magnitude 15 N at an angle è = 40° with the horizontal. The coefficient of kinetic friction between the block and the floor is 0.25. Calculate the magnitudes of (a)

  4. Physics

    You drag a heavy box along a rough horixontal floor by a horizontal rope. Identify the reaction force to each ofthe follwing forces: A) the pull of the tope on the box. B) the friction force on the box C) the normal force on the

Still need help? You can ask a new question.