A projectile is thrown with a speed 100m|s making on angle 60° with the horizontal. Find the time after which the inclination is 45°
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Explanation:
vy = 100sin60 - gt
vx = 100cos60
tan 45 = vy/vx = 1
vy = vx
100sin60 - gt = 100cos60
gt = 100(sin60 -cos60)
t = 100(sin60 -cos60)/g
t = 10(sin60 -cos60) = 5(√3 -1) sec.
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