Physics

posted by .

Assume a block on unknown weight rests on an incline of 25 degrees and is initially not moving. What push (P) is required to start moving the block if the coefficient of static friction is 0.7?

  • Physics -

    If we want the bloch to move downward along incline:
    P=F(fr)-m•g•sinα =μ•m•g•cosα - m•g•sinα = m•g(μ •cosα – sinα)
    If we want the block to move downward along incline:
    P=F(fr)+m•g•sinα =μ•m•g•cosα + m•g•sinα = m•g(μ •cosα +sinα)

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Physics/Math

    A 17 N horizontal force F pushes a block weighing 6.0 N against a vertical wall. The coefficient of static friction between the wall and the block is 0.68, and the coefficient of kinetic friction is 0.48. Assume that the block is not …
  2. physics

    A 10-KG block is pulled along a rough horizontal floor by a 12-N force acting at a 30 degrees angle with respect to the horizontal. The block accelerates at 0.1 m/s2. Calculate A....... the weight of the block B...... the force of …
  3. physics

    A 10-KG block is pulled along a rough horizontal floor by a 12-N force acting at a 30 degrees angle with respect to the horizontal. The block accelerates at 0.1 m/s2. Calculate A....... the weight of the block B...... the force of …
  4. Physics

    A 10-KG block is pulled along a rough horizontal floor by a 12-N force acting at a 30 degrees angle with respect to the horizontal. The block accelerates at 0.1 m/s2. Calculate A....... the weight of the block B...... the force of …
  5. Physics

    Assume a block on unknown weight rests on an incline of 25 degrees and is initially not moving. What push (P) is required to start moving the block if the coefficient of static friction is 0.7?
  6. physics

    a 4.00 kg block rests on a 30.0 incline. If the coefficient of static friction between the block and the incline is 0.700, what magnitude horizontal force F must act on the block to start it moving up the incline
  7. physics

    A 12 N horizontal force pushes a block weighing 5.0 N against a vertical wall (Fig. 6-26).The coefficient of static friction between the wall and the block is 0.60, and the coefficient of kinetic friction is 0.40. Assume that the block …
  8. Physics

    A 4.00-kg block rests on a 30.0° incline. If the coefficient of static friction between the block and the incline is 0.700, what magnitude horizontal force F must act on the block to start it moving up the incline, given g= 9.80m/s^2?
  9. physics

    an 85kg concrete block rests on a flat surface with coefficient of static friction=0.42. find the maximum force that can pull on the block with, angle of 38 degrees above the horizontal without moving the block?
  10. physics

    an 85kg concrete block rests on a flat surface with coefficient of static friction us=0.42. find the maximum force that can pull on the block with, angle of 38 degrees above the horizontal without moving the block?

More Similar Questions