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A man walks 7 km, east in 2 hours and 2 km in 1 hour in the same direction. a) what is the man’s average speed for the whole journey?
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Answers ( )
Explanation:
Average speed = distance / time
|v| = (7 km + 2 km) / (2 hr + 1 hr)
|v| = 3 km/hr
Average velocity = displacement / time
v = (7 km east + 2 km east) / (2 hr + 1 hr)
v = 3 km/hr east