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.

Question

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?

Answer 1

f=ma=1*5=5N

the ball moved only horizontally. Zero vertical force.

Your teacher is remarkably too easy.

Answer 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