Physics

posted by .

A boy on a bucycle drags a wagon full of newspapers at 0.80m/s for 30 minutes using a force of 40N. How much work has the boy done?

  • Physics -

    recall that speed is distance traveled per unit time, or
    v = d/t
    also recall that work is force exerted times distance, or
    W = Fd
    since in the problem we are only given the force, we calculate for the distance first.
    substituting the given speed and time to formula for speed:
    v = d/t
    0.8 = d/(30*60)
    d = 0.8*30*60 = 1440 m
    note: we multiplied 30 by 60 to convert units to seconds.
    substituting to get work,
    W = Fd
    W = 40*1440
    W = 57600 J or 57.6 kJ

    hope this helps~ :)

  • Physics -

    the answer should be 0J

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. physics

    a boy is pulling on a wagon with a force of 70 N directed at an angle of 30 degrees to the horizontal. What force is the wagon being pulled horizontally?
  2. physics

    A boy pulls his little brother in a little red wagon. He keeps the handle horizontal to the ground. His little brother and the wagon weigh 40 kg. How much tension will the boy have to place on the wagon's handle to get it moving from …
  3. Physics please help!!

    A 43.3 kg boy and a 60.0 kg girl are on the surface of a frozen lake, 10.5 m apart. Using a rope, the boy exerts a horizontal 5.90 N force on the girl, pulling her toward him. Calculate the magnitude of the boy's acceleration.
  4. Physics

    A 43.3 kg boy and a 60.0 kg girl are on the surface of a frozen lake, 10.5 m apart. Using a rope, the boy exerts a horizontal 5.90 N force on the girl, pulling her toward him. Calculate the magnitude of the boy's acceleration.
  5. physics

    A boy pulls a wagon with a force of 20N on a handle of .50 meters long. The end he holds is .25 meters higher than the end attached to the wagon. What is the magnitude of the horizontal component that acts to pull the wagon forward?
  6. physics

    A boy pushes a book by applying a force of 40N.Find the work done by the force ,if the book is displaced by 25cm along the path.
  7. physics

    A boy pushes a book by applying a force of 40N.Find the work done by the force ,if the book is displaced by 25cm along the path.
  8. physics

    A boy pushes a book by applying a force of 40N.Find the work done by the force ,if the book is displaced by 25cm along the path.
  9. physical science

    A girl on a bicycle drags a wagon full of newspapers at .80 m/s for 30 min. using a force of 40 N. How much work is done?
  10. Physics

    Alright, I can't figure it out, here's the problem. 3. A boy is giving his little sister a ride in the wagon. He pulls with an applied force of 20N. The frictional force against him is 20N and the sled is traveling 2m/s. If the boy …

More Similar Questions