Physics

A 2.9 kg block slides with a speed of 2.1 m/s on a friction less horizontal surface until it encounters a spring. (a) If the block compresses the spring 5.6 cm before coming to rest, what is the force constant on the spring? (b) What initial speed should the block have to compress the spring by 1.4 cm?

  1. 👍
  2. 👎
  3. 👁
  1. the K.E. of the block equals the P.E. of the spring

    1/2 m v^2 = 1/2 k x^2

    2.9 * 2.1^2 = k * .056^2 ... solve for k ... N/m

    2.9 * v^2 = k * .014^2
    ... substitute k and solve for v

    1. 👍
    2. 👎

Respond to this Question

First Name

Your Response

Similar Questions

  1. Physics

    A block slides from rest with negligible friction down a track, descending 5.0m to point P at the bottom. It then slides on the horizontal surface. The coefficient of friction between the block and the horizontal surface is 0.20.

  2. physics

    A block of mass 12 kg starts from rest and slides a distance of 7 m down an inclined plane making an angle of 40◦ with the horizontal. The coefficient of sliding friction between block and plane is 0.4. The acceleration of

  3. Physics

    A metal block of mass 5kg lies on a rough horizontal platform. If a horizontal force of 8 N applied to the block through its center of mass just slides the block on the platform, then the coefficient of limiting friction between

  4. 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

  1. 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

  2. physics again it didnt work.

    A moving 1.60 kg block collides with a horizontal spring whose spring constant is 295 N/m. The block compresses the spring a maximum distance of 3.50 cm from its rest position. The coefficient of kinetic friction between the block

  3. Physics

    A 1.8 kg block slides on a horizontal surface with a speed of v=0.80 m/s and an acceleration of magnitude a= 2.8m/s 2. a) What is the coefficient of kinetic friction between the block and the surface? b) When the speed of the

  4. Physics

    A moving 3.20 kg block collides with a horizontal spring whose spring constant is 224 N/m. The block compresses the spring a maximum distance of 5.50 cm from its rest position. The coefficient of kinetic friction between the block

  1. 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

  2. physics

    A block lies on a smooth plane tilted at an angle è = 28.5° to the horizontal. Ignore friction. (a) Determine the acceleration of the block as it slides down the plane. 1 m/s2 (b) If the block starts from rest 9.40 m up the

  3. Physics

    A 12 g bullet is fired horizontally into a 96 g wooden block initially at rest on a horizontal surface. After impact, the block slides 7.5 m before coming to rest. If the coefficient of kinetic friction between block and surface

  4. physics

    A(n) 11 g bullet is fired into a(n) 111 g block of wood at rest on a horizontal surface and stays inside. After impact, the block slides 14 m before coming to rest. The acceleration of gravity is 9.8 m/s If the coefficient of

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