Physics

posted by .

5) You are pushing a 55 kg refrigerator along at a constant speed of 1.5 m/s using an applied force of 250 N when the floor type changes from tile to carpet. The carpet has a coefficient of static friction of 0.62 and a coefficient of kinetic friction of 0.54. Are you pushing with enough force to keep the refrigerator moving?

No, because the force of static friction is greater than the pushing force

None of these explanations is correct

Yes, because it is already moving, it doesn't matter if the surface type changes because all surfaces have the same coefficient values

No, because it is moving at a constant speed so the net force is zero.
i'm thinking it is the 3rd option.

  • Physics -

    What made you think it is the third option? Did you do some calculations to justify this?
    For the time being, ignore the static friction, assuming as you said, the refrigerator is already moving.
    The normal reaction, N, on the carpet is mg.
    The minimum force, F, to keep the refrigerator moving at a uniform speed is μmg, where μ is the coefficient of kinetic friction.
    Does F exceed the current applied force of 250 N? The answer will lead you to the correct answer.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. physics

    You are trying to slide a refrigerator across a horizontal floor. The mass of the refrigerator is 199 kg, and you need to exert a force of 343 N to make it just begin to move. (a) What is the coefficient of static friction between …
  2. Physics

    A person pushes on a 60-kg refrigerator with a horizontal force of -260 N; the minus sign indicates that the force points in the -x direction. The coefficient of static friction is 0.68. (a) If the refrigerator does not move, what …
  3. Physics

    A person pushes on a 62-kg refrigerator with a horizontal force of -256 N; the minus sign indicates that the force points in the −x direction. The coefficient of static friction is 0.61. (a) If the refrigerator does not move, …
  4. physics

    A 220 N crate is pushed along the ground with a horizontal force. The coefficient of kinetic friction is 0.21 and the coefficient of static friction is 0.31. The crate moves at a constant speed of 4.1 m/s. a) Draw a free-body diagram …
  5. maths

    a carpet is on the floor 8m by 5m . area of border on the carpet is 12m squared.find width and length of carpet. can we use heron'S FORMULA in this?
  6. Physics

    A person pushes on a 56-kg refrigerator with a horizontal force of -251 N; the minus sign indicates that the force points in the −x direction. The coefficient of static friction is 0.7. (a) If the refrigerator does not move, …
  7. Physics

    A person pushes on a 56-kg refrigerator with a horizontal force of -260 N; the minus sign indicates that the force points in the -x direction. The coefficient of static friction is 0.58. (a) If the refrigerator does not move, what …
  8. Physics

    ou are helping your friend move a new refrigerator into his kitchen. You apply a horizontal force of F = +214i − 171k N to try and move the 64.0-kg refrigerator. The coefficient of static friction is 0.660. (a) How much static …
  9. physics

    A person pushes on a 55-kg refrigerator with a horizontal force of -250 N; the minus sign indicates that the force points in the -x direction. The coefficient of static friction is 0.56. (a) If the refrigerator does not move, what …
  10. Physics

    A person pushes on a 62-kg refrigerator with a horizontal force of -280 N; the minus sign indicates that the force points in the -x direction. The coefficient of static friction is 0.70. (a) If the refrigerator does not move, what …

More Similar Questions