Question

A particle starts with a velocity of 5 M per second and moves with a uniform acceleration of 2.5 M per second square if its velocity after 4 seconds is

Answer 1

v = v+u

v = 5+2.5(u)

v = 5+10.0

v = 15 m/s

Answer 2

u = 5 m/s

a = 2.5 m/s^2

t = 4 sec

v = ?

a = v - u / t

2.5 = v - 5 /4

v - 5 = 2.5 × 4 = 10

v = 10 + 5 = 15

Velocity after 4 seconds is 15m/s

hope it helps.