physics

a block slides along a path that is without friction until the block reaches the section of length L = 0.75 m,
which begins at height h = 2.0 m on a ramp of angle θ = 30°. In that section, the coefficient of kinetic friction is 0.40. The
block passes through point A with a speed of 8.0 m/s. If the block can reach point B (where the friction ends), what is its
speed there, and if it cannot, what is its greatest height above A?

  1. 👍 0
  2. 👎 2
  3. 👁 1,300
  1. 1/2 m vi^2 + mgh - mu mg cosθ = 1/2 m vf^2

    And you notice all the m's cancel.

    1. 👍 1
    2. 👎 9

Respond to this Question

First Name

Your Response

Similar Questions

  1. Physics

    A 3.00-kg block starts from rest at the top of a 25.5° incline and slides 2.00 m down the incline in 1.75 s. (a) Find the acceleration of the block. m/s2 (b) Find the coefficient of kinetic friction between the block and the

  2. Impulse and Momentum

    A bullet of mass m is fired at speed v0 into a wooden block of mass M. The bullet instantaneously comes to rest in the block. The block with the embedded bullet slides along a horizontal surface with a coefficient of kinetic

  3. physics

    the small 2kg block A slides down the curve path and passes the lowest point B with a speed 4 m/s. If the radius of the curvature path at B is 1.5 m, determine the normal force N exerted on the block by path at this point. Is

  4. Math/Physics2

    The block has mass m=8.5 kg and lies on a fixed smooth frictionless plane tilted at an angle theta=20.0 degrees to the horizontal. Determine the acceleration of the block as it slides down the plane. If the block starts from rest

  1. cary collage

    "A 2.5-kg block slides down a 25 degree inclined plane with constant acceleration. The block starts from rest at the top. At the bottom, its velocity reaches 0.65 m/s. The length of the incline is 1.6m. a) What is the acceleration

  2. physics

    In Figure 8-50, a block slides along a track from one level to a higher level after passing through an intermediate valley. The track is frictionless until the block reaches the higher level, where a frictional force stops the

  3. Physics

    An 8.70 kg block slides with an initial speed of 1.56 m/s **down** a ramp inclined at an angle of 28.4 with the horizontal. The coefficient of kinetic friction between the block and the ramp is 0.62. Use energy conservation to

  4. physics

    The 2 kg block in Figure 7-25 slides down a frictionless curved ramp, starting from rest at a height of h = 3 m. The block then slides d = 12 m on a rough horizontal surface before coming to rest. Figure 7-25 (a) What is the speed

  1. Physics

    Block A sits on a horizontal tabletop. There is friction between the surface and Block A. The string passes over a frictionless, massless pulley. Block B hangs down vertically. When the two blocks are released, Block B accelerates

  2. physics

    A block of mass 3kg starts from rest and slides down a surface, which corresponds to a quarter of a circle of 1.6m radius. a) if the curved surface is smooth, calculate the speed of the block at the bottom. b) if the block 's

  3. Physics

    A 4.6-kg block slides down an inclined plane that makes an angle of 26° with the horizontal. Starting from rest, the block slides a distance of 2.6 m in 4.9 s. Find the coefficient of kinetic friction between the block and plane.

  4. Physic

    A 60-g bullet fired at two blocks resting on a surface with coefficient of kinetic friction =0.5. The bullet pass through a 8-kg block and make this block slides 0.8 m. And then the bullet lodges in another block which is 6 kg.

You can view more similar questions or ask a new question.