Physics Review Question

Unit: Mechanics
Year: 1989 Question#: 17

Question: What is the magnitude of the velocity of a 25-kilogram mass that is moving with a momentum of 100. kilogram-meters per second?

(1 ) 0.25 m/s
(2 ) 2500 m/s
(3 ) 40. m/s
(4 ) 4.0 m/s

What is this question really asking?


Explanation by: Anna R
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Answer 1
0.25 m/s

INCORRECT

The formula for momentum is p=mv (p=momentum), ....try it again. return to top























Answer 2
2500 m/s
INCORRECT

The formula for momentum is p=mv (p=momentum), ....try it again. return to top



























Answer 3
40. m/s

INCORRECT

The formula for momentum is p=mv (p=momentum), ....try it again. return to top


























Answer 4
4.0 m/s

CORRECT

The formula for momentum is p=mv (p=momentum), ....so
p=mv
100kgm/s=25kg(v)
v= 4m/s. return to top


























What's this question really asking?

How do you find velocity when you have the momentum and the mass of an object? return to top

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