Prove that a + r + t = 1
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Answer:
As we know that time of flight T=
g
2uSinθ
so T
2
=4u
2
Sin
2
θ/g
2
And horizontal range is R=2u
2
SinθCosθ/g
Now on dividing T
2
by R we get T
2
/R=2tanθ/g
or gT
2
=2Rtanθ,proved.
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