A circular track has a radius of 21 m with AB as one of its diameter. A scooterist moves from A to B . along the circular path with a uniform speed of 10 m/s. Find (a) distance covered by the scooterist (b) displacement of the scooterist (c) time taken by the scooterist in reaching from A to B along the circular path
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Answer:a) 66m. b) 42m. c)6.6seconds
Step-by-step explanation:
Given: r =21 m
u=10 m/s
a). s=??
~ it will be half of the circles circumference
= 2πr/2= πr
=22/7 *21 = 66m
b). Displacement= diameter of the circle
= 2r
= 2*21
=42m
c). Time= ??
Time= distance / speed
= 66/10 = 6.6seconds
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(a) distance covered by the scooterist=1/2×2×πr=πr=22/7×21=22×3=66 m
(b) displacement of the scooterist=diameter of circular track=21×2=42 m
(c) time taken by the scooterist in reaching from A to B along the circular path=> time=distane/speed=66/10= 6.6 seconds
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