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physics problem

A quarterback throws a football to stationary receiver who is 26.5 m down the field. The football is thrown at an initial angle of 39.2 degrees to the ground. The acceleration of gravity is 9.81 m/s/s. at what initial speed must the quarterback throw the ball for it to reach the receiver?Answer in units of m/s. what is the ball's highest point during its flight? Answer in units of m.
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This is a simple question of Projectile motion (2D)in kinematics.



1. Apply formula for horizontal range

R= v x v sin20 /g, put R=26.5m , 0=39.2,g=9.8m/sxs

and obtain velocity.Please attempt on your own to have a sense of completion.



2. Height attained by ball can be obtained by result h = v x v sin0 x sin0/2g.In this result put v obtained from above to calculate h.
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