Unit: Work + Energy
Year: 1995 Question#: 15
Question: A constant force of 2.0 newtons is used to push a 3.0-kilogram mass 4.0 meters across the floor. How much work is done on the mass?
(1 ) 6.0J
(2 ) 8.0J
(3 ) 12J
(4 ) 24J
What is this question really asking?
Explanation by: Michelle H
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Answer 1
6.0J
INCORRECT
This answer is incorrect because
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Answer 2
8.0J
CORRECT
The answer is correct because work is the product of force and the distance moved.
which equals: (2.0N)x(4m)=8J.
return to top Answer 3
12J
INCORRECT
This answer is incorrect because work is the product of force and the distance moved.
return to top Answer 4
24J
INCORRECT
This answer is incorrect because work is the product of force and the distance moved.
.
return to top What's this question really asking?
Like most regents questions this one gives you more information than is needed to answer the question. To calculate work you do not need to know how much the object weighs. Be sure to read carefully and pick out only the information you need to answer the question. return to top
