The range of a particle when launched at an angle of 15° with the horizontal is 1.5 km. What is the range of the projectile when launched at an angle of 45° to the horizontal
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The range of a particle when launched at an angle of 15° with the horizontal is 1.5 km. What is the range of the projectile when launched at an angle of 45° to the horizontal

G1 Physics · Accepted Answer

R = (u²/g)sin2θ. At 15°, R₁ = (u²/g)sin30° = ½(u²/g) = 1.5 km, so u²/g = 3.0 km. At 45°, sin90° = 1, therefore R₂ = 3.0 km. Hence option B.