Question 4.
Which has the greatest momentum when moving at 2 m/sec?(1 point)
A. a small car
B. a child on a skateboard
C. a small falling rock
D. a heavy truck
I chose B.
2 answers
Correct! The equation for momentum is momentum = mass x velocity. Since the child on a skateboard has less mass than the small car or heavy truck, but is moving at the same velocity, the child on the skateboard will have the greatest momentum. The falling rock doesn't have a velocity given in the question, so we cannot determine its momentum.
Yay finally! Thanks so much!