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Question

A flower pot falls off a window sill and falls past the window below. It takes 0.5 s to pass through a window that is 2.0 m above the ground. Find how high is the window sill from the ground?
(Take g=10 m/s2)


A
2.5 m
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B
2.25 m
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C
3.25 m 
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D
4.5 m
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Solution

The correct option is C 3.25 m 
Let h be the height of sill from the window.

Initial velocity of the pot was zero and taking downward direction positive,
h=ut+12gt2 
h=0+12×10×(12)2
h=1.25 m
Hence height of window sill from ground =1.25+2=3.25 m

Physics

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