Question

I have problem in this question​

Answer 1

Answer:

16

Explanation:

v^2 = u^2 + 2as

v = 10

v^2 = 10*10 = 100

u^2 = ?

a = 5

s = 8.4

so,

v^2 = u^2 + 2as

100 = u^2 + 2*5*8.4

100 = u^2 + 10*8.4

100 = u^2 + 84

100 - 84 = u^2

16 = u^2

u = 4