A sphere with a mass of 2.0 kg achieves an acceleration of 2 m/s2 when it strikes a stationary sphere with a mass of 0.5 kg. Assuming the larger sphere comes to a complete stop, what result would support Newton’s second law?

for finding the midpoint of any given 2 pair of points simply add the respective x coordinates with other x coordinate and the y coordinate with other y coordinate and divide them by 2

in your question it will be :

(3+1)/2 for the x coordinate of mid point i.e 2

[8+(-4)]/2 for the y coordinate of midpoint i.e 2

so coordinates of mid point of points (3,8) and (1,-4) will be (2,2)

if you use photomath right away it will give you the answer not like this app that you have to wait for people.

after simplifying it i got: -36.25 as my answer. hope that !