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

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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

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