Q.

A projectile has a time of flight T and range R. If the time of flight is doubled keeping the angle of projection constant , what happens to the range ?

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a

R4

b

R2

c

2R

d

4R

answer is D.

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Detailed Solution

RT2=u2sin⁡2θ×g2g4u2sin2⁡θ=g2cot⁡θi.e, gT2=2Rtan⁡θIf T is doubled, then R becomes 4 times.
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