Answer:
Below
Step-by-step explanation:
Here is what newton's first law states :
" An object will remain in straight line motion due to inertia unless acted on by an external force"
If you've ever been on a roller coaster you would know that when you go over the top of the roller coaster you feel lighter or feel like you are being lifted out of your seat. This is due to the effect of interia! Because the roller coaster car is a mass, it wants to continue in the direction it is traveling. If the roller coaster is going up the hill, the acceleration of the coaster wants to keep pushing you up. However, when the coaster goes over the hill, the force of gravity is pulling you down. The track forces the coaster to go down, and gravity is the force that is pulling it down. This is the force that changes the object's motion.
Hope this helps!