Question

Find the displacement of the car which increases its speed from 20m/s to 80m/s in 12 seconds

Answer 1

v = u + at
a = (v - u) / t
a = (80 - 20) / 12
a = 5 m/s^2

S = (v^2 - u^2) / (2a)
= (80^2 - 20^2) / (2 * 5)
= 600 m

Displacement of the car is 600 m

Answer 2

displacement= v-u\ t
ie. 80-20by 12
60\12= 5
therefore the displacement is 5 m