physics

posted by .

How much applied force is needed to accelerate a 2.0 kg block of wood at 4.0m/s^2 along a rough table, against a 10 N force of friction?

  • physics -

    Now we have two forces:

    First is our force F
    Second is that friction force, opposite to F so call it -10 Newtons

    The block accelerates, so there is a net force (UNbalanced forces) which is net F =(F-10).
    Since they are unbalanced and acceleration A results:

    netF = m A

    (F-10) = 2 * 4
    F - 10 = 8
    F = 18 N
    If you do not get this PLEASE respond. You simply have to understand these three questions you asked before you go to the next chapter. This is the heart of the matter.

  • physics -

    Thank you so much I understand now !

  • physics -

    Excellent - Those questions are extremely important.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. physics

    A 2.0kg block is sitting on a 15 degree incline. The coefficient of friction is 0.22. What is the minimum force needed to cause the block to accelerate UP the slope?
  2. Physics

    A 4.0 kg block is stacked on top of a 12.0 kg block, whcih is accelerating along a horizontal table at a = 5.2 s^-2 m. Let Mu k = Mu s = Mu. (a) What mininum coefficent of friction Mu between the two blocks will prevent the 4.0 kg …
  3. Physics

    ok part (b) A 4.0 kg block is stacked on top of a 12.0 kg block, whcih is accelerating along a horizontal table at a = 5.2 s^-2 m. Let Mu k = Mu s = Mu. (a) What mininum coefficent of friction Mu between the two blocks will prevent …
  4. Physics

    15kg block rests on a rough surface (u=.35) a 100N force to the left is applied to the block. what is the magnitude and direction of the net force acting on the block?
  5. physics

    A block of wood of mass 6.0 kg slides along a skating rink at 12.5 m/s^2 [w] . The block slides onto a rough section of ice that exerts a force of 30 N force of friction on the block of wood. The acceleration of the block of wood is …
  6. physics

    A block of wood of mass 6.0 kg slides along a skating rink at 12.5 m/s^2 [w] . The block slides onto a rough section of ice that exerts a force of 30 N force of friction on the block of wood. The acceleration of the block of wood is …
  7. Physics

    1.A 4.5kg object is at rest on a table with state friction of 0.56 and kinetic friction of 0.46. A force is applied such that the object just beings to move. If that same force is maintained, at what rate will the object accelerate?
  8. physics

    A 4.170 kg block of wood rests on a steel desk. The coefficient of static friction between the block and the desk is μs = 0.505 and the coefficient of kinetic friction is μk = 0.255. At time t = 0, a force F = 12.7 N is applied …
  9. Physics

    A 4.500 kg block of wood rests on a steel desk. The coefficient of static friction between the block and the desk is μs = 0.455 and the coefficient of kinetic friction is μk = 0.155. At time t = 0, a force F = 12.4 N is applied …
  10. physics

    A 6.110 kg block of wood rests on a steel desk. The coefficient of static friction between the block and the desk is μs = 0.455 and the coefficient of kinetic friction is μk = 0.255. At time t = 0, a force F = 16.8 N is applied …

More Similar Questions