Q.

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

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a

R/4

b

R/2

c

2R

d

4R

answer is D.

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Detailed Solution

RT2=u2sin⁡2θ/g4u2sin2⁡θ/g2=g2cot⁡θ  i.e., gT2=2Rtan⁡θ If T is doubled, then R becomes 4 times.
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