Question

If  v = 20 m/s , a = 5 m/s² ,  t = 2 sec, calculate 'u' by  using  Newton's  equation  of  motion.​

Answer 1

Answer:

Since v=u+at

20=u+5(2)

20-10=u

therefore, u=10m/sec

Answer 2

Answer:

u = 10 m/s

Explanation:

given :- v = 20 m/s

a = 5 m/s²

t = 2 sec

let initial velocity (u) be U

using newton's equation of motion :-

v = u + at => 20 = U + 5(2)

=> 20 = U + 10

=> 20 - 10 = U

=> 10 = U

Therefore , initial velocity (u) - 10 m/s