A car accelerates from 25 km/hr to 55 km/hr in 30 seconds. What is its acceleration?
1km per second. That's how I was taught, 55-25=30. 30seconds, subract... equals one, one per second.
The FORMULA : a=final velocity-initial velocity/ divided by time. Just plug in the numbers.
55-25=30 km/h .Convert the unit to m/s. 30,000m/3600s = 25/3 m/s .acceleration= (25/3)/30 =0.28 m/s^2.