Physics Review Question

Unit: Mechanics
Year: 1997 Question#: 12
Question: What is the magnitude of net force acting on a 2.0 x 103 kilogram car as it accelerates from rest to a speed of 15 meters per second in 5 seconds?
(1 ) 6.0 x 103 N
(2 ) 2.0 x 104 N
(3 ) 3.0 x 104 N
(4 ) 6.0 x 104 N

What is this question really asking?




Explanation by: Eric D

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Answer 1
6.0 x 103 N

CORRECT

Nice use of Fnet = ma and  or better yet  return to top























Answer 2
2.0 x 104

inCORRECT
Try using Fnet = ma and  or better yet  return to top



























Answer 3
3.0 x 104

INCORRECT

Try using Fnet = ma and  or better yet  return to top


























Answer 4
6.0 x 104

INCORRECT

close but you have the wrong exponent you need to go back and see where the 10 to the 4th came from. Try using Fnet = ma and  or better yet  return to top


























What's this question really asking?

Do you understand that Impulse (Ft) equals the change in momentum ()? return to top

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