Answer:
Acceleration an automobile is .
Explanation:
Acceleration is defined as a rate of change of velocity with respect to to change in time.
Given that automobile moving straight in the line changes its speed from 25 km/hr to 70 km.hr in 20 seconds.
Change in velocity = 70 km/hr - 25 km/hr = 45 km/hr
1 km = 1000 m , 1 hour = 3600 seconds
Duration of time = 20 seconds =
Acceleration an automobile: