Q.

Two projectiles of same mass  are thrown at same speed an angles 60° and 30° with the horizontal, then which will remain same

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a

time of flight

b

range of projectile

c

maximum height acquired

d

all of them

answer is B.

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Detailed Solution

As θ2=90−θ1So range of projectile, R1=v02sin⁡2θg=v022sin⁡θcos⁡θgR2=v02sin⁡90−θ1cos⁡90−θ1g & R2=v022cos⁡θ1sin⁡θ1g=R1
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