Leopold accelerates a 3 kg ball 4.0 m/  The vertical acceleration of the ball is zero. The force of gravity is the only external force acting on the ball other than the forces Leopold exerts on it. a. How large is the horizontal force Leopold exert on the ball at this instant to cause its 4.0 m/ horizontal acceleration? b. How large is the vertical force Leopold exerts on the ball at this instant?

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