InterviewSolution
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InterviewSolution
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A car runs at a constant speed on a circular track of radius 150 m taking 62.8 s on each lap. The average speed and average velocity on each complete lap is (π = 3.14) just asking for confirmation |
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Answer» :-→ Average speed of the car = 15 m/s→ Average velocity of the car = 0 m/sExplanation :-For average speed :-DISTANCE travelled in each lap is equal to the CIRCUMFERENCE of the circle. So, average speed of the car on each complete lap will be GIVEN by :-v = Circumference/Time⇒ v = 2πr/t⇒ v = (2 × 3.14 × 150)/62.8⇒ v = 942/62.8⇒ v = 15 m/sFor average velocity :-After COMPLETING each lap, the car will ultimately return at the same position from which it started. So initial and FINAL points of the car are same .∴ Displacement of the car = 0Now, it's average velocity will be given by :-v = Total displacement/Time⇒ v = 0/62.8⇒ v = 0 m/s |
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