Question

the velocity of a particle moving with constant acceleration at an instant time zero is 10 meter per second after 5 second of this instant the velocity of the particle is 20 meter per second. the velocity at 3 second before time zero

Answer 1

a=v-u/t
20 -10/5=2
so a =2
let velocity before 3 sec =p
10 = p + 2 x 3
10 = p + 6
p= 4m/s
thanks