a = dv/dt The increase in speed = (30 -12) = 18 m/s. Then, A = 18/15 = 1.2 metre per second square

In constant speed, acceleration does not change. So, it covers equal distances in equal time intervals.

Let “s” be total displacement, then s/2 = V⁰ t₁ or t₁ = s / 2V⁰ and, s/2 = V₁ t₂ + V₂t₃ = (V₁ + V₂) t₂ To find, Average velocity = Total displacement / Total time (should be ...

Time travel to cover 24 m with the speed of 4 metre per second, t₁ = 24/4 = 6 s Time travel to cover 32 m with the speed of 8 metre per second, t₂ = 32/8 = 4 ...

Total length of path covered by train = 400 + 150 = 550 m Train to cross the bridge (Find, Time Taken) = Total distance / speed = 550 / 50 = 11 s