Question

a bus starts from rest and attains 40km/h velocity after 10 seconds.calculate acceleration of the bus in km/h

Answer 1

We have,

Initial velocity, u = 0
Time, t = 10s = 10/3600 h = 0.0027 h
Final velocity, v = 40km/h

Now,

v = u + at

Or 40 = 0 + 0.0027a

Or 40 = 0.0027a

Or a = 40/0.0027 = 40/27 × 10⁻⁴ = 1.481 × 10⁴ km/h