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A projectile is thrown with velocity U = 20 m/s + 5% at an angle 60o. If the projectile falls back on the ground at the same level then which of following can not be a possible answer for range. [Consider g = 10m/s2]
(a) 39.0 m
(b) 37.5 m
(c) 34.6 m
(d) 32.0 m
(a) R = (?20?^2×sin???120?^o ?)/g=20√3=?R/R=24U/U =>R = (2×5)/100×200√3=R/R=24U/U 20√3-2√3<R<20√3+2√3 => 31.1 m < R < 38.1 m
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