You drive your car 2 km to the gas station, 4 km to the shopping mall to let your mother off, and 4.5 km back home. The trip takes 20 min. What is your velocity in m/s?

-9 m/s

+4 m/s

0 m/s

-3 m/s

Your velocity is 8.75 m/s

1. Find the total distance.

2 km + 4 km + 4.5 km = 10.5 km

2. Convert this distance into metres.

1 kilometre = 1000 metres

10.5 x 1000 = 10,500 metres

3. Convert the time taken into seconds.

1 minute = 60 seconds

20 x 60 = 1,200 seconds

4. Divide the total distance by the total time taken.

10,500 / 1,200 = 8.75

Your velocity is 8.75 m/s