COLLEGE PHYSICS

posted by .

A 62.0 kg skier is moving at 6.50 m/s on a frictionless, horizontal snow covered plateau when she encounters a rough patch 3.50 m long. The coefficient of kinetic friction between this patch and returning to friction-free snow, she skis down an icy, frictionless hill 2.50 m high.
(a) How fast is the skier moving when she gets to the bottom of the hill?
(b) How much internal energy was generated in crossing the rough patch?

  • COLLEGE PHYSICS -

    You seem to have omitted some words of the question, along with the coefficient of kinetic friction.

    Subtract the work done crossing the rough patch from the initial kinetic energy, and then add the additional kinetic energy gained when going down the frictionless hill.

    From the final kinetic energy, compute the final velocity.

  • COLLEGE PHYSICS -

    Whoops! Here is the complete question.

    A 62.0 kg skier is moving at 6.50 m/s on a frictionless, horizontal snow-covered plateau when she encounters a rough patch 3.50 m long. The coefficient of kinetic friction between this patch and her skis is 0.300. After crossing the rough patch and returning to friction-free snow, she skis down an icy, frictionless hill 2.50 m high.

    (a) How fast is the skier moving when she gets to the bottom of the hill?
    (b) How much internal energy was generated in crossing the rough patch?

  • COLLEGE PHYSICS -

    The work done (creating heat "internal energy") is
    (Friction Force) *( distance)
    = M g *0.300* 3.50 .
    M is the mass and g is the acceleration of gravity.
    The answer will be in Joules

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. physics

    A skier is coasting on perfectt smooth snow at 7.0 m/s and crosses a rough patch of snow 35m long. If the frictional force exerted on the skier is 6.0 N, what is her speed as she leaves the patch of snow?
  2. physics

    A skier starts from rest at the top of a hill that is inclined at 10.3° with the horizontal. The hillside is 210 m long, and the coefficient of friction between snow and skis is 0.0750. At the bottom of the hill, the snow is level …
  3. physics

    Josh starts his sled at the top of a 2.0 m-high hill that has a constant slope of 25 degrees . After reaching the bottom, he slides across a horizontal patch of snow. The hill is frictionless, but the coefficient of kinetic friction …
  4. Physics

    A skier starts from rest at the top of a hill that is inclined at 9.8° with the horizontal. The hillside is 170 m long, and the coefficient of friction between snow and skis is 0.0750. At the bottom of the hill, the snow is level …
  5. physics

    A mass m = 11.0 kg rests on a frictionless table and accelerated by a spring with spring constant k = 4979.0 N/m. The floor is frictionless except for a rough patch. For this rough path, the coefficient of friction is μk = 0.46. …
  6. physics

    A skier starts from rest at the top of a hill that is inclined at 9.5° with respect to the horizontal. The hillside is 225 m long, and the coefficient of friction between snow and skis is 0.0750. At the bottom of the hill, the snow …
  7. physics

    A 62.0 skier is moving at 6.10 on a frictionless, horizontal snow-covered plateau when she encounters a rough patch 3.30 long. The coefficient of kinetic friction between this patch and her skis is 0.330. After crossing the rough patch …
  8. Physics

    A puck of mass .30 kg is sliding along an essentially frictionless patch of ice at 6.0 m/s. It encounters a rough ice patch with a coefficient of kinetic friction of .10. How long will it take for the puck to stop?
  9. physics

    A skier starts from rest at the top of a frictionless incline of height 20.0 m, as shown in the figure. At the bottom of the incline, the skier encounters a horizontal surface where the coefficient of kinetic friction between skis …
  10. Physics

    A 55.3 kg skier is moving at 14.9 m/s on a frictionless horizontal, snow covered plateau when she encounters a rough patch 1.7 m long. The coefficient of kinetic friction between this patch and her skis is 0.27. After crossing the …

More Similar Questions