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A missile is fired for maximum range with an initial velocity of 20 m/s. If g=10 m/(s²), the range of the missile is

Asked in NEET 2011 · Range and angle of projection

Answer: (1) 40 m

Step-by-step solution

Given: u=20 m/s, fired for maximum range, g=10 m/s².

Idea: the range (u² sin 2θ)/g is largest when sin 2θ=1, that is at θ=45°.

Rₘₐₓ=(u²)/g.

=((20)²)/(10)=(400)/(10).

=40 m.

Why the other options are wrong

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