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Grade
8 missing activity pics/10

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Objects in motion will stay in motion if it is going the same speed and in the same direction (unless acted upon by an unbalanced force), and objects at rest will stay at rest.

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Definition: When the force on an object is 0 N, the forces are balanced. Balanced forces do not cause any change in motion.

Balanced forces were seen in the table cloth activity because before the table cloth was pulled, the forces on the setup was 0 N. This connected back to the first law because everything was at rest, and objects need unbalanced forces in order to be in motion.

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Definition: When the force on an object isn't 0 N, the forces are unbalanced.They are necessary to put unmoving objects in motion.

Unbalanced forces were seen in the table cloth magic activity because when the table cloth was pulled out from underneath the dishes, the net force on those things wasn't 0 N, so the forces on it were unbalanced and the table cloth was in motion. This connects back to the first law of motion because the table cloth was in motion, and stayed in motion until it was stopped.

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Definition: A force is a push or pull on an object to change its motion.

Force was seen in the activity where you have to get the marker on the ring into the glass jar. If you pulled/pushed the ring with too much force, the marker would not land in the  jar. If you used the proper amount of force and in the correct direction while pulling or pushing, the marker would land in the jar. This connects to the first law because before any push or place took place, the objects were at rest, and then when the force did take place, the marker was in motion.

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Definition:
Inertia is an object's tendency to resists any change in motion, and will not move until it is acted upon by an outside force.

Inertia was seen in the "Table Cloth Magic" activity when the table cloth did not move until someone pulled it, and the dishes never moved because there was no force acting directly on it. This connects back to Newton's first law of motion because the dishes were objects at rest, and they stayed at rest since they were not acted upon by an unbalanced force.

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Definition: An object at rest is an object that is not moving.

This was seen in the activity with the ring and marker, because when the marker was on the ring on the jar, the objects were at rest, and were not moving. This connects back to Newton's first law because object's at rest stay at rest until acted upon by an unbalanced force.

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Definition: Mass is the measure of an object's inertia. An object with a greater mass would have greater inertia, because it would be heavier and its tendency to resist change in motion would be stronger.

This was seen in the table cloth activity because the heavier dishes on the table cloth had a stronger tendency to resist change in motion. This connects back to the first law of motion because the objects on the cloth were at rest and stayed at rest.

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Definition: When an object is in motion, it was acted upon by an unbalanced force and is now moving with a certain velocity, and will not stop moving unless another unbalanced force hits them.

This was seen in the ring and marker activity when there was a force acting on the ring, the marker moved and was in motion. It did not stop until the force of the bottom of the jar it. This connects back to Newton's first law of motion because the marker was in motion until the force of the jar's bottom hit the marker, causing it to stop moving and to become at rest.