Physics

posted by .

In Figure 8-34, a 1.2 kg block is held at rest against a spring with a force constant k = 695 N/m. Initially, the spring is compressed a distance d. When the block is released, it slides across a surface that is frictionless, except for a rough patch of width 5.0 cm that has a coefficient of kinetic friction ┬Ák = 0.44. Find d such that the block's speed after crossing the rough patch is 1.5 m/s.

  • Physics -

    energy stored in spring= 1/2 k d^2

    energy in f riction= mg*mu*.05m

    leftover energy= 1/2 m 1.5^2


    well, initial energy=finalenergy+frictionwork

    solve for d

  • Physics -

    energy in f riction= mg*mu*.05m = 5.886

    leftover energy= 1/2 m 1.5^2 = 1.35

    So, If I add the leftover energy and the energy in friction I get the initial energy.

    Then what??

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Physics

    I am stumped on this homework problem and would like help at least to get me thinking in the right direction: It is a 2-D problem where a spring "plunger" is being used to propel a block forward. More specifically: the block rests …
  2. Physics

    In Figure 8-34, a 1.2 kg block is held at rest against a spring with a force constant k = 785 N/m. Initially, the spring is compressed a distance d. When the block is released, it slides across a surface that is frictionless, except …
  3. Physics HELp

    In Figure 8-34, a 1.2 kg block is held at rest against a spring with a force constant k = 785 N/m. Initially, the spring is compressed a distance d. When the block is released, it slides across a surface that is frictionless, except …
  4. PHYSICS

    A 16 kg block slides down a 30 degree frictionless incline where it is stopped by a strong Hook's Law spring at the bottom. The spring constant is k = 9.8 x10^4 N/m. If the block slides 9 m from the point where it was released (from …
  5. physics

    a 2.0kg block is pushed against a spring that has a force constant of 10 n/m. the spring is compressed 10 cm. when the block is released, it slides across a rough surface for 25 cm before it stops. find the coefficient of friction …
  6. as

    In the figure a 1.2 block is held at rest against a spring with a force constant = 740 . Initially, the spring is compressed a distance . When the block is released, it slides across a surface that is frictionless except for a rough …
  7. Physics

    A block is suspended from the end of a spring. An external force holds the block so that initially the spring is not stretched or compressed. When the block is released, it oscillates up and down between positions A and B. If the mass …
  8. Physics

    A 2.95 kg block on a horizontal floor is attached to a horizontal spring that is initially compressed 0.0330 m. The spring has force constant 900 N/m. The coefficient of kinetic friction between the floor and the block is 0.42 . The …
  9. PHYSICS

    A 2kg block is on a level table and held against a spring with k =150N/m which has been compressed 15 cm. he block is released from rest and pushed across the table. When the block leaves the spring it beins to experience fricion with …
  10. mechanics

    Jayden holds a 3kg block pressed up against a spring on a horizontal and frictionless surface. The spring has a spring constant of 300Nm. The spring is fixed in place, but the block is free to move. The spring is initially compressed …

More Similar Questions