Question

The speed of a motorcycle increases from 10.0 km/hr to 50.0 km/hr in 9.0 seconds. What is the acceleration?

Answer 1

well, it increased by 40 km/hr in 9 s, so the acceleration is

40/9 km/(hr-s)

Not the usual units, so let's make everything meters and seconds

40/9 km/hr-s * 1000m/km * 1hr/3600s = 1.234 m/s^2

Answer 2

9+4

Answer 3

the speed of a train increases from 100km/hr to 250km/hr in 5 min what is the acceleration