HW10 - homework 10 RAHMAN, TARIQUE Due: Feb 29 2008, 3:00...

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homework 10 – RAHMAN, TARIQUE – Due: Feb 29 2008, 3:00 am 1 Question 1, chap 7, sect 3. part 1 of 2 10 points If a golf ball and a ping-pong ball both move with the same kinetic energy, which has the greater speed? 1. Cannot be determined 2. the golf ball 3. the ping-pong ball 4. The two balls have the same speed. Question 2, chap 7, sect 3. part 2 of 2 10 points In a gaseous mixture of massive molecules and light molecules with the same average KE, which have the greater speed? 1. the light molecules 2. Cannot be determined 3. They have the same speed. 4. the massive molecules Question 3, chap 7, sect 3. part 1 of 1 10 points A piece of paper of mass m is dropped from a height H , to the ±oor (height = 0). The force of air friction has magnitude f . The net work W net done on the paper is 1. W net = mg H . 2. W net = - f H . 3. W net = - mg H . 4. W net = f H . 5. W net = ( mg - f ) H . 6. W net = ( f - mg ) H . Question 4, chap 7, sect 1. part 1 of 1 10 points A catcher “gives” with a baseball when catching it. If the baseball exerts a force of 473 N on the glove such that the glove is displaced 5.25 cm, how much work is done by the ball? Answer in units of J. Question 5, chap 7, sect 3. part 1 of 3 10 points A 0 . 419 kg particle has a speed of 8 . 6 m / s at point A and kinetic energy of 9 . 8 J at point B . What is its kinetic energy at
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This note was uploaded on 02/03/2010 for the course PHY 303K taught by Professor Turner during the Fall '08 term at University of Texas at Austin.

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HW10 - homework 10 RAHMAN, TARIQUE Due: Feb 29 2008, 3:00...

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