Smart! From $$F_x = m a_x$$, we have $$a_x = \frac{F_x}{m}$$. $$F_x$$, the x-component of the force is the $$\cos$$ component as we have discussed before. Similarly for $$F_y$$.
We know that if a ball is falling freely, it accelerates downwards at $$g = 9.8 \, \mathrm{m/s^2}$$. If an object has a mass of $$5 \, \mathrm{kg}$$, what is the force that the Earth exerts on the object in Newtons? (Remember that Force is a vector.)
• $$0$$
• $$5 \times 9.8$$
• $$5 \times -9.8$$
• $$\frac{5}{-9.8}$$