Assertion When θ = 45° or 135°, the value of R remains the same, only the sign changes.Reason R = u2 sin 2θg [AIIMS 2017]
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a
Both Assertion and Reason are correct and Reason is the correct explanation of Assertion.
b
Both Assertion and Reason are correct and Reason is not the correct explanation of Assertion.
c
Assertion is correct but Reason is incorrect.
d
Assertion is incorrect but Reason is correct.
answer is A.
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Detailed Solution
Horizontal range, R = u2 sin 2θgWhen θ = 45°, maximum horizontal range,Rmax=u2gsin90°=u2gWhen θ = 135°, maximum horizontal range,R=u2gsin270°=-u2gNegative sign implies opposite direction.