Q.
At what angle with the horizontal should a ball be thrown so that the range R is related to the time of flight as R=5 T2? (Take g= 10 ms-2)
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a
30o
b
45o
c
60o
d
90o
answer is B.
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Detailed Solution
RT2=gsin2θ4sin2θ=g2cotθ=5cotθ Given RT2=5 Hence, 5=5cotθ or θ=45°
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