physics

A block is released on an inclined plane from a height of 1m. There is friction (static and kinetic =.4) and the mass of the block is 5 kg, the mass of the pulley is 1 kg and it has a radius of 5 cm. The slope of the incline is 30 degrees.

Find the acceleration of the block as it slides down the plane.
Find the velocity of the block at the bottom of the plane.

asked by Rachael
  1. Wb = mg = 5kg * 9.8N/kg = 49N.

    Fb = 49N @ 30 eg. = Force of block.
    Fp = 49sin30 = 24.5N. = Force parallel to incline.
    Fv = 49cos30 = 42.4N. = Force perpendicular to incline.

    Fk = u*Fv = 0.4 * 42.4 = 17N. = Force of kinetic friction.

    1. a = (Fp-Fk) / (m1+m2),
    a = (24.5-17) / (5+1) = 1.25m/s^2.

    2. Vf^2 = Vo^2 + 2g*d,
    Vf^2 = 0 + 19.6*1 = 19.6,
    Ff = 4.43m/s.

    posted by Henry

Respond to this Question

First Name

Your Answer

Similar Questions

  1. Physics

    A block P of mass 2.75 kg is lying on a rough inclined plane of angle è=0.87 radians. Block P is attached via a model string that passes over a model pulley to a second block Q of unknown mass M kg hanging vertically. The
  2. physics

    In the Figure the pulley has negligible mass, and both it and the inclined plane are frictionless. Block A has a mass of 1.3 kg, block B has a mass of 2.7 kg, and angle è is 26 °. If the blocks are released from rest with the
  3. Physics

    A block with mass m1 on a plane inclined at angle  to the horizontal is connected to a second hanging block with mass m2 by a cord passing over a small, frictionless pulley, as shown. The coefficient of static friction is
  4. physics

    In the Figure the pulley has negligible mass, and both it and the inclined plane are frictionless. Block A has a mass of 1.3 kg, block B has a mass of 2.7 kg, and angle è is 26 °. If the blocks are released from rest with the
  5. Physics

    A 2.5 kg block sits on an inclined plane with a 30 degree inclination. A light cord attached to the block passes up over a light frictionless pulley at the top of the plane and is tied to a second 2.5 kg mass freely hanging
  6. physics

    In the Figure the pulley has negligible mass, and both it and the inclined plane are frictionless. Block A has a mass of 1.3 kg, block B has a mass of 2.7 kg, and angle è is 26 °. If the blocks are released from rest with the
  7. physics

    Two blocks are connected by a string over a frictionless, massless pulley such that one is resting on an inclined plane and the other is hanging over the top edge of the plane. The inclined plane is inclined at an angle of 37
  8. physics

    A block of mass m1 = 21.3 kg is at rest on a plane inclined by θ = 30.00 degrees. It is connected via a rope and pulley system to another mass m2 = 24.5 kg, as shown. The coefficients of static and kinetic friction between
  9. physical

    A block with mass m1 on a plane inclined at angle Ą to the horizontal is connected to a second hanging block with mass m2 by a cord passing over a small, frictionless pulley, as shown. The coefficient of static friction is Us
  10. Physics

    This is the info for the problem: A block of mass M1 = 160.0 kg sits on an inclined plane and is connected to a bucket with a massless string over a massless and frictionless pulley. The coefficient of static friction between the

More Similar Questions