Calculate the change in velocity of second hand of a clock in 15 second if length of second hand is 10cm.
meenakshi997sa:
answer is √2??
how ?
displacement i m getting 10√2... so velocity=2√2/3......... by mistake typed √2.
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okay....
Thank you...
Answers
Answered by
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velocity = displacment / time
displacment = 10√2 cm
time = 15 s
velocity = 10√2/15
velocity = 2√2 / 3 m/s
Hope it helped you....
displacment = 10√2 cm
time = 15 s
velocity = 10√2/15
velocity = 2√2 / 3 m/s
Hope it helped you....
Answered by
2
hope it helps you.....
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application parallelogram law of vector addition
u want me ti tell application??
yes
even in this question parallelogram law of vector addition is used........ actually this law is used to find the resultant of any 2 vectors in a plane..... here the 2 radius marking the boundary of displacement can be taken as 2 vectors.... so we will get S^2 = r^2 + r^2 - 2r^2cos 90 = 2 r^2(1 - cos90) = 4r^2 sin^2(90/2) so......... S= 2 r sin45
thanks
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