When an object moves in a straight line with uniform acceleration, the displacement is 10m in the fifth second and 20m in the seventh second,

When an object moves in a straight line with uniform acceleration, the displacement is 10m in the fifth second and 20m in the seventh second,

Let v be the initial velocity in 5 seconds and a be the acceleration
Then, the velocity at the end of 5 seconds (V + a), the initial velocity at 7 seconds (V + 2a), the final velocity at 7 seconds (V + 3a)
There is a formula: V end & sup2; - V beginning & sup2; = 2As
(v+a)² - v² = 2a *10
(v+3a)² - (v+2a)² = 2a *10