# Ch9 HW1 S2008 - Ch9 HW1 S2008 10:32 AM Web Assign Ch9 HW1 S2008(Homework Current Score 22.5 out of 22.5 Due Monday 12:00 PM EDT Description Energy

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4/25/08 10:32 AM Ch9 HW1 S2008 Page 1 of 2 http://www.webassign.net/v4cgikseiloff3@gatech/student.pl?h=20080425141246kseiloff3@gatech192168016 Ch9 HW1 S2008 (Homework) KRISTIN SEILOFF Instructor: Jennifer Curtis Description Energy and momentum in collisions Instructions Reading: Section 9.1-9.3 In this assignment you may submit each question part (answer box) separately. Different numbers of submissions are allowed for each part -- Click Show Details to see this. Web Assign Current Score: 22.5 out of 22.5 Due: Monday, March 24, 200812:00 PM EDT 1. 4/4 points A ball whose mass is 0.3 kg hits the floor with a speed of 7 m/s and rebounds upward with a speed of 5 m/s. If the ball was in contact with the floor for 1.5 ms ( 1.5 10 -3 s), what was the average magnitude of the force exerted on the ball by the floor? F avg = 2400 N. Calculate the magnitude of the gravitational force that the Earth exerts on the ball: mg = 2.94 N In a collision, for a brief time there are forces between the colliding objects that are much greater than external forces. Which of the following is true during the collision between the bouncing ball and the floor? (_) The magnitude of the gravitational force exerted by the Earth is much greater than the magnitude of the force exerted by the floor.

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## This note was uploaded on 10/19/2009 for the course PHYSICS 2211M taught by Professor Schatz during the Spring '06 term at Georgia Institute of Technology.

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Ch9 HW1 S2008 - Ch9 HW1 S2008 10:32 AM Web Assign Ch9 HW1 S2008(Homework Current Score 22.5 out of 22.5 Due Monday 12:00 PM EDT Description Energy

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