A baseball outfielder throws a baseball of mass 0.15 kg at a speed of 30 m/s and initial angle of 30°.What is the kinetic energy of the baseball at the highest point of the trajectory? Ignore air friction.

Question

Quizplus · Accepted Answer

At the highest point of the trajectory, the vertical component of the velocity is zero, but the horizontal component remains unchanged. The initial horizontal velocity is 30 m/s * cos(30°) = 25.98 m/s. The kinetic energy at the highest point is (1/2) * 0.15 kg * (25.98 m/s)^2 = 51 J.

A Baseball Outfielder Throws a Baseball of Mass 0