What is the momentum of a 100-kilogram fullback carrying a football on a play at a velocity of 3.5 m/sec.

100 Kg * 3.5 m/sec = 350 Kg-m/s

Explanation:

Momentum= F= Δ(mv) with m= mass, v= velocity, and Δ the change in mass and velocity

In this problem you are given all the factors you need to solve the equation you simply just plug in  your mass (1,000 Kg) and Velocity (3.5m/s) and multiply them by each other to get your answer

acceleration = (change in speed) / (time for the change)

change in speed = (20-120)= -100 m/s.

1.5 min = 90 sec

acceleration = -100/90 = -1.11 m/s^2.

we don't care about the 150kg or the 2,500 meters. they don't make any difference.

read more on -