Grant accelerates a 1kg ball 5.0m/s2 horizontally. 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 Grant exerts on it.

a-How large is the horizontal force grant exerts on the ball at this instant to cause its 5.0m/s2 horizontal acceleration?

b-How large is the vertical force Grant exerts on the ball at this instant?

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  1. f=ma=1*5=5N

    the ball moved only horizontally. Zero vertical force.

    Your teacher is remarkably too easy.

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  2. bobpursley answer is correct for the first one

    but for b there is a vertical force of 9.81 because of the gravitational force

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