A football is kicked from ground level with an initial velocity of 23.8 m/s at angle of 42.5° above the horizontal. How long, in seconds, is the football in the air before it hits the ground? Ignore air resistance.

The  value  is  

Explanation:

From the question we are told that    

      The  initial velocity is  

       The angle is

Generally from the projectile motion equation we know that the time of flight is mathematically represented as

=>    

=>      

it is called kinetic energy

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