A ball is thrown at an angle of 15above the horizontal from the top of a 50 - m building and lands 85 m from the base of the building . Ignore air resistance . ( a ) How long is the ball in the air ? ( b ) What must have been the initial horizontal component of the velocity ? ( c ) What is the magnitude of the vertical component of the initial velocity ? ( d ) What is the magnitude of the vertical component of the velocity just before the ball hits the ground ? ( e ) What is the magnitude of the velocity ( including both the horizontal and vertical components ) of the ball just before it hits the ground ?

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Projectile Motion