Write Newton’s Second Law of Motion in vector form.

On aircraft carriers, catapults are used to accelerate jet aircraft to flight speeds in a short distance. One such catapult takes a 17,800-kg jet from 0 to 68 m/s in 2.6 s. (Assume the catapult acts in the positive horizontal direction. Indicate the direction with the sign of your answer where appropriate.) How far does the jet travel while it is accelerating?

Using the alternate form of Newton's second law, compute the force (in N) needed to accelerate a 1,170 kg car from 0 to 24 m/s in 18 s. The change in momentum is the car's momentum when traveling 24 m/s minus its momentum when going 0 m/s. (Enter the magnitude.)   ________________N

The mass of a subway car and passengers is 43,900 kg. If its acceleration as it leaves a station is 0.7 m/s2, what is the net force (in N) acting on it? (Enter the magnitude.) ______ N