Ask questions and get helpful answers.

A force of 100N pulls a box of weight 200N along a smooth horizontal surface makes 45(degree) to the floor .

Calculate the work done by the force.

A- in moving the box a distance of 25m along the horizontal.
B- against gravity.
C- against normal force.

  1. 👍
  2. 👎
  3. 👁
  4. ℹ️
  5. 🚩
1 answer
  1. Horizontal component = 100 cos 45 = 70.7
    Work done by moving 25 m = 70.7*25 Joules

    THE MOTION IS HORIZONTAL!!!

    It does not move in the direction of gravity, thus zero

    It likewise does not move in the direction of the normal force --> zero

    This is a trick question intended to remind you that the work done is force IN THE DIRECTION OF MOTION times distance moved (also of course in the direction of motion)

    1. 👍
    2. 👎
    3. ℹ️
    4. 🚩

Answer this Question

Related Questions

Still need help?

You can ask a new question or browse existing questions.