HOLIDAY ASSIGNMENT

- A boy cycles continuously through a distance of 1.0km in 5 minutes. Calculate his average speed.

Solution

1km = 1000m

1 minutes =60 seconds

5 minutes = 5×60 = 300 seconds

Average speed = distance/time

1000/300 = 3.33m/s - A car travels with a constant velocity of 45km/hr for 20 seconds. What distance does it cover in this time.

Solution

Conversion of units

Velocity 45km/hr =( 45×1000)/(60×60) = 12.5m/s

Distance = velocity×time

12.5×20 = 250m