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a ball of mass m is thrown directly upward by a baseball player at time t=0 seconds with initial
velocity vo . At time t = 2.67 seconds the ball has reached it's highest point and subsequently begins
to fall to Earth. At time t = 2.67 seconds, the magnitude of the net force acting on the ball is
Omg
O O
O 1/2gt²
Omg-vot

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