# A football is projected at an angle of 45° from the ground with an initial velocity of 10 m/s, take acceleration due to gravity is g = 10 m/s^2.What is the time of flight?

Category: QuestionsA football is projected at an angle of 45° from the ground with an initial velocity of 10 m/s, take acceleration due to gravity is g = 10 m/s^2.What is the time of flight?
Editor">Editor Staff asked 1 year ago

A football is projected at an angle of 45° from the ground with an initial velocity of 10 m/s, take acceleration due to gravity is g = 10 m/s^2.What is the time of flight?

(a) 1.4142 s

(b) 1.5361 s

(c) 1.8987 s

(d) 1.5651 s

The question was posed to me in a job interview.

The question is from Simple Projectile Motion topic in portion Motion in a Plane of Physics – Class 11
Select the correct answer from above options
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Editor">Editor Staff answered 1 year ago

Right option is (a) 1.4142 s

Explanation: The formula for time of flight is t = 2(v sinθ/g). Here, v = 10,  θ = 45°, g = 10. Hence, on solving we will get the time of flight as 1.4142 s.

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