Question

if a ball throw up vertically wih velocity 10m/s.than what will the velocity after 2sec

Answer 1

v = u + at

(Where v-final velocity, u-initial velocity, a- accleration, t- time)

= 10 + (-10)×2

=-10 m/s

(-ve sign denotes that the veolcity is against the force applied i.e. gravity in this case and a=-10 because retardation will take place as the ball is thrown upwards.)