Motion in a Plane - Result Question 45
48. A car runs at a constant speed on a circular track of radius $100 m$, taking 62.8 seconds in every circular loop. The average velocity and average speed for each circular loop respectively, is
[2006]
(a) $0,10 m / s$
(b) $10 m / s, 10 m / s$
(c) $10 m / s, 0$
(d) 0,0
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Solution:
- (a) Distance covered in one circular loop $=$ $2 \pi r$
$=2 \times 3.14 \times 100=628 m$
avg Speed $=\frac{628}{62.8}=10 m / sec$
Displacement in one circular loop $=0$
avg Velocity $=\frac{0}{\text{ time }}=0$
