A man pulls a 25kg sled a distance of 80 meters across a flat, snowy surface. He holds the handle of the sled at an angle of 30degrees with the ground. How much work does he do on the sled against the force of friction?(Assume the coefficient of sliding friction between the sled and the snow to be .1, and cos30=.87).

  1. 👍 0
  2. 👎 0
  3. 👁 212
  1. Ws = m*g = 25kg *9.8N/kg = 245 N. = Wt of sled.

    Fs = 245N @ 0o. = Force of sled
    Fp = 245*sin(0) = 0 = Force parallel to
    Fv = 245*cos(0) = 245 N. = Force perpendicular to surface.

    Fn = !@#$%^&*cos30-Fp-0.1(Fv-!@#$%^&*sin30) = ma
    0.87!@#$%^&-0-0.1(245-0.5!@#$%^&) = 25*0 = 0
    0.87!@#$%^& - 24.5 + 0.05!@#$%^& = 0
    0.92!@#$%^& - 24.5 = 0
    0.92!@#$%^& = 24.5
    !@#$%^& = 24.5 / 0.92 = 26.6 N. = Force applied.

    Work = !@#$%^&*cos30 * d
    Work = 26.6*cos30 * 80 = 1851.4 Joules.

    1. 👍 0
    2. 👎 0

Respond to this Question

First Name

Your Response

Similar Questions

  1. Sarah

    A light spring having a force constat of 125 N/m is used to pull a 9.50kg sled on a horizontal frixtionless ice rink. If the sled has an acceleration of 2.00 m/s^2, by how much does the spring stretch if it pulls on the sled (a)

    asked by Physics on June 15, 2009
  2. physics

    It's a snowy day and you're pulling a friend along a level road on a sled. You've both been taking physics, so she asks what you think the coefficient of friction between the sled and the snow is. You've been walking at a steady

    asked by Jack on October 18, 2013
  3. Physics

    A light spring having a force constant of 125 N/m is used to pull a 9.50 kg sled on a horizontal ice rink. The coefficient of kinetic friction between the sled and the ice is 0.200. The sled has an acceleration of 2.00 m/s^2. By

    asked by Student B on June 13, 2011
  4. physics

    Suppose the ski patrol lowers a rescue sled and victim, having a total mass of 95.0 kg, down a θ = 50.0° slope at constant speed. The coefficient of friction between the sled and the snow is 0.100. (a) How much work is done by

    asked by Karina on July 9, 2015

    Jamal pulls a 150-N sled up a 28.0 degrees slope at constant speed by a force of 100 N. Near the top of the hill he releases the sled. With what acceleration does the sled go down the hill?

    asked by Meme on October 3, 2013
  1. physics

    Wayne pulls a 305 N sled along a snowy path using a rope that makes a 45.0° angle with the ground. Wayne pulls with a force of 42.3 N. The sled moves 16 m in 3.0 s. What power does Wayne produce?

    asked by Merlin on April 26, 2011
  2. science

    Diego pulls a 4.5 kg sled across level snow with a force, F, of 230 N on a rope that is 35.0° above the horizontal. If the sled moves a distance of 65.5 m, how much work does Diego do? what formula do i use?

    asked by DONIA on December 19, 2007
  3. physics

    A boy is pushing his sled up a snowy slope. The sled has a mass of 20.4 kg and weighs 200 N. The boy pushes with a constant force of 75 N. The sled travels a distance of 10 m and gains 3 m in height. When the sled reaches the top,

    asked by bill on March 27, 2013
  4. physics

    A boy pulls a sled of mass 5.0 kg with a rope that makes an 60.0° angle with respect to the horizontal surface of a frozen pond. The boy pulls on the rope with a force of 10.0 N; and the sled moves with constant velocity. What is

    asked by Anonymous on March 10, 2010
  5. Physics

    Josh pulls a sled with a force of 100-N at an angle 30° above horizontal axis. The total mass of the sled and Josh’s sister is 60.0-kg. The friction coefficient between the surface and the sled:static= 0.160; kinetic= 0.100 a)

    asked by Meg on November 5, 2017
  6. Physics

    A father pushes horizontally on his daughter's sled to move it up a snowy incline, as illustrated in the figure, with h = 3.9 m and θ = 11°. The total mass of the sled and the girl is 35 kg and the coefficient of kinetic

    asked by Sandi on December 4, 2010

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