Question

a car initially traveling at 15 meters per second north accelerates to 25 meters per second north in 4 seconds.the magnitude of the average acceleration is

Answer 1

|Average acceleration| = (change in speed) / (time for the change) .

Change in speed = (speed at the end) - (speed at the beginning) =

= (25 m/s) - (15 m/s) = 10 m/s .

|Average acceleration| = (10 m/s) / (4 sec) = 2.5 m/s² .