Answer:
I think that's Newton's second law of motion
Explanation:
f = m(v-u)
________
t
since a = (v-u)t
f = ma
Answer:
a) 
b) 
Explanation:
From the exercise we know:
;
; 
;
; 
The formula for average velocity is:

a) 
The formula for average acceleration is:

b) 
<span>I believe this question has additional detail which stated
that during the 1st half, his speed was 2.01 m/s. From this we can
calculate his speed during the second half, v2, using the formula:</span>
v_ave = (v1 + v2) / 2
2.05 m/s = (2.01 m/s + v2) / 2
<span>v2 = 2.09 m/s</span>
The medicine ball wall hit the ground faster, if that makes sense to you