physics

posted by .

A 3.3 kg wooden block is placed on 22 degree inclined plane and is connected by a string that passes over a light friciton less pulley at the top of the incline and then attached to a hanging 3.0kg block.If the coefficient of static friction bet the 1st block and the surface of the plane is 0.25 and coefficient of kinetic friction is 0.15
a)which direction will the first block move, up the plane or down the plane if it does.
b)Calculate the acceleration of the system and the tension force in the string.

  • physics -

    Draw the diagram. Next resolve the weight of the block into normal, and down the plane components.

    Normal: mgCosTheta
    downtheplane: mgSinTheta

    Up the plane force is 3g

    Friciton is mgCosTheta*mu

    Now sum forces: Assume friction is down the plane.

    Net force= totalmass*a
    3g-mgSinTheta-mgCosTheta*mu= (3+3.3)a
    solve for a. If a is zero, then you chose the wrong direction for friction, and you know answer a).

  • physics -

    A doubly tethered model airplane of mass 1.0 kg is attached to a vertical rod by two very light strings that are 2.0 each in length. the airplane and the the strings rotate in a horizontal circleabout the rod with both the strings remaining taut.The attachment points of the strings are also separated by 2.0 m If the tension in the upper string is 39.2 N. Calculate
    a)the tension in the lower string.Is it likely to be less or more than the tension in the upper string?
    b)the steady speed of the ball as it undergoes circular motion.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Physics

    A 3.3 kg wooden block is placed on 22 degree inclined plane and is connected by a string that passes over a light friciton less pulley at the top of the incline and then attached to a hanging 3.0kg block.If the coefficient of static …
  2. 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 hanging block has a mass of 16 kg and the one on the …
  3. 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 coefficient …
  4. 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 vertically. …
  5. 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 degrees. …
  6. 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 degrees. …
  7. Physics

    Two blocks are connected by a string on a pulley. One block is on an incline, and the other is hanging. The smooth inclined surface makes an angle of 35 ∘ with the horizontal, and the block on the incline has a mass of 5.7 kg. …
  8. AP 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 hanging block has a mass of 16 kg and the one on the …
  9. Physics

    A 2 kg block is resting on a 37 degree frictionless inclined plane, attached by a string to a frictionless pulley at the top of the plane, over which a second mass of 3.3 kg hangs down. Find the magnitude of the hanging mass’s acceleration.
  10. physics

    Acceleration of a Mass in a Pulley System Block 1 of mass m1 slides on a frictionless plane inclined at angle θ with respect to the horizontal. One end of a massless inextensible string is attached to block 1. The string is wound …

More Similar Questions