a truck is moving at an average speed of 24 kmph along a circular path takes 12 secs to turn through an angle of 12° . find the radius of the portion of the path.
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Answer:
Radius = 0.38 km
Step-by-step explanation:
average speed v = 24 km/h = 24 x 5/18 = 20/3 m/s
Time t = 12 s
Angle θ = 12° = 12xπ/180 =π/15
Distance covered s = arc length
= rθ
= πr/15 m
s = v/t ⇒ s = vt
πr/15 = 20/3 x 12
r = 381 m
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