Name the two quantities, the slope of whose graph gives :

(a) speed, and (b) acceleration

A bus running at a speed of 18 km/h is stopped in 2.5 seconds by applying brakes. Calculate the retardation produced.

A train starting from rest moves with a uniform acceleration of 0.2 m/s² for 5 minutes. Calculate the speed acquired and the distance travelled in this time.

A cheetah starts from rest, and accelerates at 2 m/s² for 10 seconds. Calculate :

(a) the final velocity

(b) the distance travelled.

A train travelling at 20 m s^-1 accelerates at 0.5 m s^-2 for 30 s. How far will it travel in this time?