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Calculate speed and velocity in the given case. (a) a body starts from a point a and complete one and a half round in 23 seconds. calculate speed (b) calculate speed after 1.5 rounds and and velocity after 1.5 rounds |
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Answer» The RADIUS of the circle= r(i) When it completes half circle:-(Refer to Image 1)DISTANCE= 2circumference = 22πr Distance= πrDisplacement= r+r=2r(ii) When it completes 3/4 TH of the circle:-The distance covered= 43 (CIRCUMFERENCE)⇒ 43 (2πr)= 23 πrThe displacement= AB (Refer to Image 2)By using pythagoras theoremAB 2 =r 2 +r 2 ⇒AB 2 =2r 2 ⇒AB= 2 rDisplacement= 2 rDistance= 23 πr |
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