A skateboarder with a mass of 45 kilograms is riding on a skateboard with a mass of 2.5 kilograms. What should be the velocity of the skateboarder if she has to attain a momentum of 264 kilogram meters/second?
A. 5.5 meters/second
B. 55.5 meters/second
C. 1.2 × 102 meters/second
D. 1.2 × 103 meters/second
E. 1.2 × 104 meters/second

Question

A skateboarder with a mass of 45 kilograms is riding on a skateboard with a mass of 2.5 kilograms. What should be the velocity of the skateboarder if she has to attain a momentum of 264 kilogram meters/second?
A. 5.5 meters/second
B. 55.5 meters/second
C. 1.2 × 102 meters/second
D. 1.2 × 103 meters/second
E. 1.2 × 104 meters/second

abb0t · Answer

momentum = mass $\times$ velocity.

you alreayd have the mass, just add the mass of the skateboarder and the skateboard to get the total mass.
then, use your algebra to rearrange the formula and solve for velocity.
[HINT: you're dividing]

anonymous · Answer

So 5.5?