Question

6. A boy drives his scooter with a uniform speed of 45 km h-1. Find :

(i) the time taken to cover 900 m.
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Answer 1

Answer:

Step-by-step explanation:

if the speed is uniform, acceleration will be equal to zero"0"

use

s=ut+1/2at^2 to find the time  (40km/h=12.5m/s)

s= ut+1/2at^2

900 = 12.5*t +1/2*0*t^2

900= 12.5t

900/12.5=t

t=72s