A small car increases its speed from 10 m/s to 15 m/s. Its mass is 1,200 kg. What is the impulse? A. 6,000 kg-m/s
B. 18,000 kg-m/s
C. 12,000 kg. m/s
D. 1,200 kg-m/s

A

Explanation:

We know that impulse(J) is the force times the change in time OR mass times the change in velocity. Because we're given mass and a final and initial velocity, we'll use the second option written as:

mΔv=J

Since Δ means change in, and Δv= vf-vi, we subtract 10 m/s from 15 m/s to get 5 m/s for Δv.  

Now plugging in Δv and m(1,200 kg)

1,200 kg * 5 m/s =J

6000 kg* m/s = J

truck y has a greater velocity than truck x.