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an outfielder throws a 1.9 kg baseball at a speed of 78 m/s and the initial angle os 17° what is the kinetic energy of the ball at the highest point of motion

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atharvalawate9
Calculate the 2 horizontal and verticle vectors of the velocity 78 m/s
the horizontal vector is what we want becoz the verticle vector is goin to be 0 at the max height. 
the horizontal vector if 7.8Cos(17) = 7.46 m/s

So, now we have the velocity and we already have the mass, we can calculate KE,
.5(m)(v)^2
= 5779.8 J

I hope my answer is right, if not just comment, i will help u

:)

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