Physics

posted by .

Calculate the work done by the applied force accelerating a 2 kg object at 3 m/s/s over 4 m if there is a 2.5 frictional force of resistance. I calculated using F=ma=6N; then net force = 6N-2.5N=3.5 N so W=fd=14J. Did I do this correctly? Thanks

  • Physics -

    work done=2.5*3 + 2*3*4 I get more than you. You did the accelerating force only, you have to add the force working against friction

  • Physics -

    Help!I'm really lost on this one.

  • Physics -

    correction: I mistyped the distance on friction.

    Workdone=2.5*4+2*3*4 joules.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Physics

    Under what condition can a force act on an object and yet do no work on that object?
  2. Physics

    A grocery cart with a mass of 18 kg is pushed at constant speed along an aisle by a force F = 12 N. The applied force acts at a 20° angle to the horizontal. Find the work done by each of the forces on the cart if the aisle is 14 m …
  3. 11th garde physics

    A grocery cart with a mass of 18 kg is pushed at constant speed along an aisle by a force F = 12 N. The applied force acts at a 20° angle to the horizontal. Find the work done by each of the forces on the cart if the aisle is 17 m …
  4. 11th grade physics

    Rachel pulls her 177N suitcase at a constant speed by pulling on a handle that makes an angle (-) with the horizontal. Using frictional force on the suitcase as 27N and Rachels force on 43N on the handle to calculate the net force. …
  5. Physics

    If a horizontal force of 200 N is applied to a 430 N object, causing it to accelerate across a horizontal surface, and the net force on the object is 72 N, what is the value of frictional force between the obejct and the surface?
  6. physics

    e4) a rope applies a horizontal force of 190 N to pull a crate a distance of 2 m across the floor. A frictional force of 50N opposes this motion a) what is the work done by the force applied by the rope?
  7. Physics

    A 58kg skier is coasting down 25degrees slope at an initial velocity of 3,6m per second.A kinetic frictional force of 70N appores the motion.Calculate the net force acting on the skeir, (b)the work done by net force, (c)the final kinetic …
  8. Physics

    A trunk of mass m = 1.100 kg is pushed a distance d = 32.0 cm up an incline with an angle of inclination theta = 26.0 ° by a constant horizontal force P = 150. N. The coefficient of kinetic friction between the trunk and the incline …
  9. Physics

    I was wondering if my answers are correct. 1. A 50kg person is taking a ride on an elevator travelling up at a steady speed of 2.5m/s. Find the time fo the elevator trip if the elevator does 4900 J of work on the person. My answer: …
  10. Physics

    A rope applies a horizontal force of 208 N to pull a crate a distance of 1.91 m across the floor. A frictional force of 154 N opposes this motion. (a) What is the work done by the force applied by the rope?

More Similar Questions