Physics Review QuestionUnit:
MechanicsYear:
1997 Question#:
12Question:
What is the magnitude of net force acting on a 2.0 x 10^{3} kilogram car as it accelerates from rest to a speed of 15 meters per second in 5
seconds?(1
) 6.0 x 10^{3} N(2
) 2.0 x 10^{4} N(3
) 3.0 x 10^{4} N(4
) 6.0 x 10^{4} NWhat is this question really asking?
Explanation by: Eric D [ Return to question menu
]Answer 1
6.0 x 10 ^{3} NCORRECT Nice use of F _{net} = ma and
or better yet
return to top
Answer 2
2.0 x 10 ^{4}inCORRECT Try using F _{net} = ma and
or better yet
return to top
Answer 3
3.0 x 10 ^{4}INCORRECT Try using F _{net} = ma and
or better yet
return to top
Answer 4
6.0 x 10 ^{4}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 F _{net} = 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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