A projectile is thrown with a velocity of 18 m / s at an angle of 60 o with horizontal. The interval between the moments when speed is 15 m / s is g = 10 m / s 2

Question

A projectile is thrown with a velocity of 18 m / s at an angle of 60 o with horizontal. The interval between the moments when speed is 15 m / s is g = 10 m / s 2, 12 5 s, 4 5 s, 12 s, 2 5 s

MARKS App · Accepted Answer

V x = 18 × c o s 60 o = 9 m / s ∴ V y = 1 5 2 - 9 2 = 12 m / s ∴ Δ t = 2 × 12 g = 12 5 s

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