Answer:
V1 A1 = V2 A2
V1 = 10m/s
A1 = 8m
10x8 =80
V2 =?
A2 = 4m
80 = V2 x 4
÷4
20 = V2
V2 =20m/s
Explanation:
If one halfs, the other doubles & vice versa. (Like inverse proportion or the reciprocal). That's why when you half 8m, the velocity doubles, on the other side. Then, balances out.
Hope this helps!
