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Awesome! $$F = m a$$. We know that $$m = 5$$. As the object is going down, $$a = -9.8$$. Therefore, $$F = 5 \times -9.8$$.
What if the same ball sits on a table without moving down? What is the net force on it?
• $$0$$
• $$5 \times 9.8$$
• $$5 \times -9.8$$
• $$\frac{5}{-9.8}$$