Q.
A ball is thrown at different angles with the same speed u and from the same point and it has the same range in both the cases. If y1 and y2 are the heights attained in the two cases, then y1 + y2 is equal to
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a
u2g
b
2u2mg
c
u22g
d
u24g
answer is C.
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Detailed Solution
y1=u2sin2θ2g,y2=u2sin290∘−θ2g=u2cos2θ2g ⇒ y1+y2=u22g
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