Physics Review Question Unit: Energy Year: 1995 Question#: 18 Question: A 1.0 x103 -kilogram car is moving at a constant speed of 4.0 meters per second. What is the kinetic energy of the car? (1 ) 1.6 x 103 J (2 ) 2.0 x 104 J (3 ) 8.0 x 103 J (4 ) 4.0 x 103 J What is this question really asking? Explanation by: Dan M [ Return to question menu ] Answer 1 1.6 x 103 J INCORRECT Looks like you forgot the 1/2 KE =1/2mv2 return to top Answer 2 2.0 x 104 J INCORRECT Try KE =1/2mv2 return to top Answer 3 8.0 x 103 J CORRECT KE =1/2mv2 8.0 x103 J = 8,000J return to top Answer 4 4.0 x 103 J INCORRECT Try KE =1/2mv2 return to top What's this question really asking? How much kinetic energy does the car have? return to top |
[Home] [Lessons] [Review] [Search] [Links]
This web site is designed and maintained by Science Joy Wagon and may
not be reproduced or redistributed without written permission from Science Joy Wagon. |