We have an object moving at 5 m/s with mass 5 kg. It undergoes a quick collision with some other object and now moves at 1 m/s. What was the change in the objects momentum

-20 kg. m/s

Explanation:

We have an object moving at 5 m/s with mass 5 kg. The initial momentum is:

pi = m * vi

pi = 5 kg * 5 m/s = 25 kg. m/s

It undergoes a quick collision with some other object and now moves at 1 m/s. The final momentum is:

pf = m * vf

pf = 5 kg * 1 m/s = 5 kg. m/s

The change in the object's momentum is:

Δp = pf - pi

Δp = 5 kg. m/s - 25 kg. m/s = - 20 kg. m/s