physics

posted by .

1. You slowly lift a book of mass 2 kg at a constant velocity a distance of 3 m. How much work did you do on the book?

I got 180 for this

2. A 15 kg crate is moved along a horizontal floor with a rope that makes a 30 degree angle with the horizontal. If the tension in the rope is 200 N and the crate is slid 10 meters, how much work has been done on the crate?

3. True or False: An object that is motionless has no energy

4. What is the kinetic energy of a ball of mass .1 kg traveling at a speed of 160 m/s?

5. Assuming air resistance is zero (negligible), how high up would a .06 kg tennis ball travel if hit straight into the air at initial speed of 50 m/s?

6. A stunt woman scales a 40 meter high cliff. What is her potential energy due to gravity relative to the ground?

7. Imagine you are 100 kg and standing at the edge of a hole that goes to the center of the earth. What is your potential energy relative to the center of the earth?

  • physics (1) -

    1. The work done is W = M g H
    H is the distance it is lifted
    Try again

    You need to review the definitions of potential and kinetic energy and make an effort on the other questions.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Physics

    you lift a 10 N physics book up in the air a distance of 1m at a constant velocity of .5m/s. What is the work done by the weight of the book?
  2. physics

    a 1.50 kg book is sliding along a rough horizontal surface. At point A it is moving at 3.21 m/s, and at point B it has slowed to 1.25m/s. 1.) How much work was done on the book between A and B?
  3. Physics

    A 1.1 kg book is lying on a 0.77 m -high table. You pick it up and place it on a bookshelf 2.3 m above the floor. 1. How much work does gravity do on the book?
  4. physics

    A student librarian picks up a 2.2 kg book from the floor to a height of 1.05 m. He carries the book 8.3 m to the stacks and places the book on a shelf that is 0.35 m above the floor. How much work does he do on the book?
  5. Physics

    A student librarian picks up a 2.2 kg book from the floor to a height of 1.05 m. He carries the book 8.3 m to the stacks and places the book on a shelf that is 0.35 m above the floor. How much work does he do on the book?
  6. PHYSICS

    You push your physics book 2.20m along a horizontal tabletop with a horizontal push of 2.20N while the opposing force of friction is 0.500N . How much work does your 2.20N push do on the book?
  7. Physical Science-Physics

    You need to pick up a book off the floor and place it on a table top that is 0.78 m above ground. You expend 1.56 J of energy to lift the book. The book has an acceleration of 1.54 m/s squared. What is the book's mass?
  8. Physics

    1. A student librarian picks up a 2.2 kg book from the floor to a height of 1.0 m. He carries the book 5.3 m to the shelves and places the book on a shelf that is 0.65 m above the floor. How much work does he do on the book?
  9. Physics

    A book with a mass of 1350 g is sitting on a desk. The ukf between the book and the desk is .45 and the ukf between the book and the desk is .30. a. how much horizontal force is required to start the book moving across the desk?
  10. math

    Book 1 255 book 2 235 book 3 178 book 4 299 book 5 150 book 6 67 book 7 82 book 8 267 book 9 188 book 10 142 book 11 281 book 12 138 book 13 326 book 14 264 book 15 103 ^ number of pages What would be the best graph or display to represent …

More Similar Questions