Question

A cyclist accelerates from 0 meters per second to 8 meters per second in 3 seconds. What is his acceleration? Is his acceleration higher than that of a car accelerates from 0 to 30 meters per second in 8 seconds

Answer 1

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

For the biker:
|Acceleration| = (8 - 0) / (3) = 1-2/3 m/s³

For the car:
|Acceleration| = (30 - 0) / (8) = 3-3/4 m/s³

The magnitude of the car's acceleration is  2-1/4 times
that of the biker ... pretty substantially greater.