Post a New Question

physics

posted by .

from what height must a heavy elastic ball be dropped on a floor ,so thatafter reboundingthrice it will reach a height of 16 m?take e=(0.5)

  • physics -

    After the 1st rebounce the speed is v/2, after the 2nd rebounce – v/4,
    after the third rebounce –v/8, =>
    m(v/8)²/2=mgh₁
    v=sqrt(128gh₁) =141.7 m/s
    mv²/2=mgh
    h= v²/2g=141.7²/2•9.8=1024 m

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. PHYSICS

    A ball of mass 0.150kg is dropped from a height of 1.25m. It rebounds from the floor to reach a height of 0.960m. What impulse was given to the ball by the floor?
  2. physics

    A ball of mass 0.120 kg is dropped from rest from a height of 1.25 m. It rebounds from the floor to reach a height of 0.600 m. What impulse was given to the ball by the floor?
  3. momemtum ?

    A ball of mass 0.150 kg is dropped from rest to a height of 0.125 m. It rebounds from the floor to reach a height of 0.960m. What impulse was given by the floor?
  4. physics 111

    A ball of mass 0.120 kg is dropped from rest from a height of 1.25 m. It rebounds from the floor to reach a height of 0.600 m. What impulse was given to the ball by the floor?
  5. physics

    A ball of mass 0.120 kg is dropped from rest from a height of 1.25 m. It rebounds from the floor to reach a height of 0.600 m. What impulse was given to the ball by the floor?
  6. engineering mechanics

    from what height must a heavy elastic body be dropped on a floor so that after rebounding thrice it will reach a height of 16m?
  7. Physics

    After a 0.200-kg rubber ball is dropped from a height of 1.95 m, it bounces off a concrete floor and rebounds to a height of 1.45 m. (a) Determine the magnitude and direction of the impulse delivered to the ball by the floor. (b) Estimate …
  8. Physics

    After a 0.200-kg rubber ball is dropped from a height of 1.95 m, it bounces off a concrete floor and rebounds to a height of 1.45 m. (a) Determine the magnitude and direction of the impulse delivered to the ball by the floor. (b) Estimate …
  9. PHYSICS

    A ball is dropped onto the floor from a height of 20m. It rebounds to a height of 15m. If the ball was in contact with the floor for 0.01sec what was its average acceleration during the contact take g=10m/s
  10. physics

    A ball is dropped from a height of 8m onto a horizontal floor and rebounds to a height of 12m.what is the coefficient of restitution between the ball and the floor?

More Similar Questions

Post a New Question