Science

A ball of mass 200 g is dropped from a height 3 m above the ground onto a hard floor, and rebounds to a height of 2.2 m. If the ball is in contact with the floor for 0.002 s calculate the average force exerted by the floor on the ball

  1. 👍 0
  2. 👎 0
  3. 👁 384
  1. V^2 = Vo^2 + 2g*h = 0 + 19.6*3 = 58.8
    V = 7.67 m/s.

    V^2 = Vo^2 + 2g*h = 0 @ max ht.
    Vo^2 - 19.6*2.2 = 0
    Vo^2 = 43.12
    Vo = 6.57 m/s.

    a = (-6.57-7.67)/0.002s = -7120 m/s^2.

    F = m*a = 0.20 * (-7120) = -1424 N.

    1. 👍 0
    2. 👎 0
  2. A ball of mass 1kg is dropped from a height of 7m and rebounds to a height of 4.5m. Calculate:
    (I) its KE just before impact
    (II) its initial rebound velocity and KE
    (III) Account for the loss of KE on the impact.

    1. 👍 0
    2. 👎 0

Respond to this Question

First Name

Your Response

Similar Questions

  1. Physics

    2. Consider the ball example in the introduction when a ball is dropped from 3 meters. After the ball bounces, it raises to a height of 2 meters. The mass of the ball is 0.5 kg a. What is the speed of the ball right before the

    asked by Sarah on November 5, 2015
  2. PHYSICS

    A ball thrown horizontally with speed vi = 26.0m/s travels a horizontal distance of d = 60.0m before hitting the ground. From what height h was the ball thrown? Which I got this answer below. h= 26.1 m How do I solve for the one

    asked by Iris PHYS on February 5, 2015
  3. science

    A ball of mass 1 kg dropped from 9.8m height , strikes the ground and rebounds to a height of 4.9m .If the time of contact between ball and ground is 0.1s,then find impulse and average force acting on ball.

    asked by Kundan on September 10, 2017
  4. math

    a ball is dropped from a height of 3m and bounces on the ground . At the top of each bounce, the ball eaches 60% of its previous height. Calculate the total distance travelled by the ball when it hits the ground for the fifth time

    asked by Melissa on December 17, 2011
  5. Physics

    a ball is released from the top of a 67.0 m high building. At the same instant a second ball is shot straight up from the ground with an initial speed of 20.0 m/s, directly below the point where the first ball was dropped. Ignore

    asked by Chris on August 13, 2018
  1. Math

    Suppose an object is dropped from a height h0 above the ground. Then its height after t seconds is given by h = −16t 2 + h0, where h is measured in feet. Use this information to solve the problem. A ball is dropped from the top

    asked by G on January 24, 2015
  2. physics

    a .140 kg baseball is dropped from rest from a height of 2.2m above the ground. it rebounds to a height of 1.6 m. what change in the balls momentum occurs when the ball hits the ground

    asked by vicki on February 23, 2011
  3. Physics

    A rubber ball with a mass of 0.130 kg is dropped from rest. From what height was the ball dropped, if the magnitude of the ball's momentum is 0.710 kg · m/s just before it lands on the ground?

    asked by Nicco on November 5, 2014
  4. Math- Check over please

    A ball is dropped from a height of 3m and bounces on the ground. At the top of each bounce, the ball reaches 60% of it's previous height. Calculate the total distance travelled by the ball when it hits the ground the fifth time.

    asked by Mae on January 5, 2009
  5. 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)

    asked by Joe on March 5, 2014
  6. Algebra

    A. A bowling ball is dropped from a height of 35 feet write a function that gives the height h (in feet) of the bowling ball after t seconds H(t)=__ B. Find the height of the bowling ball after 1 second C. How long does the

    asked by Kylet davis on March 2, 2016

You can view more similar questions or ask a new question.