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.

  1. 0
  2. 0
  3. 29
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.

    1. 0
    2. 0
    posted by Henry

Respond to this Question

First Name

Your Response

Similar Questions

  1. physics

    A block of mass m is initially at rest at the top of an inclined plane with a height = 4.4 m which makes and angle of θ = 17 degrees with respect to the horizontal. It is observed to be traveling at v = 0.2 m/s a distance d after

    asked by carlo on October 8, 2013
  2. Physics

    A block is released from rest at the top of an inclined plane. The height of the plane is 5.00 m and it makes an angle of 30.0 degrees with the horizontal . The coefficient of kinetic friction between block and surface is 0.200.

    asked by Fernando on October 9, 2014
  3. Phsycis/Math (please help)

    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

    asked by Jared on November 20, 2013
  4. 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

    asked by Haff on November 20, 2013
  5. Physics

    A block of ice of mass 30 kg is at rest atop an inclined plane of vertical height 2 m. It is released and slides down the inclined plane. What is its speed at the bottom of the inclined plane?

    asked by Hannah on March 2, 2017
  6. science

    A steel block weighing 12N is pulled up an incline plane 20° above the horizontal by a constant force of 7.35 N which makes an angle of 10° above the inclined plane. The block stars from rest and is pulled 2.0m along the

    asked by John on June 20, 2018
  7. 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

    asked by Margaret on October 11, 2013
  8. physics

    A block of mass m takes time t to slide down on a smooth inclined plane of angle of inclination theta and height h. If same block slids down on a rough inclined plane of same angle of inclination and some height and takes time n

    asked by urgent !!!!!!!!! on August 7, 2014
  9. 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

    asked by Anonymous on March 6, 2012
  10. Physics

    A block of mass 0.5 kg rests on a smooth inclined plane. It is then pushed by a horizontal force of 16N. When the block has displaced 5m along the inclined plane. What would be the speed of the block if the plane is rough and a

    asked by Alex on December 5, 2010

More Similar Questions