1) A car moves with uniform velocity, v1, for one-third of its journey. The car then moves with velocity v2=20 km/h to complete the journey. If the average velocity of the car is 27 km/h for the whole journey, find v1.
Can you pls show the formula and workings to complete this question? thank you!
2) A pupil runs round a circular field of radius 70 km. If he uses 40 minutes to complete one round, what is his velocity?
Is the answer 0km/min or 11km/min? Since velocity is related to displacement and the pupil's displacement remains 0.
Thank you for taking this time to answer my questions... =)
2007-10-19
04:35:52
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3 answers
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asked by
anonymoustjl
2
in
Physics