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Grade
10/10

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An object is balanced when the net forces are 0 N. When an object has balanced forces, it's not in motion. This is represented in the  hoop and marker activity when everything was set up and the marker was balanced on the hoop and the hoop was balanced on the jar. Nothing was moving so they had balanced forces.

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An object is unbalanced when the net forces on a object is not 0 N . When an object has unbalanced forces, then the object will be in motion. This is represented in the hoop and marker activity when the hoop is pulled out from under the marker. An unbalanced force, gravity acts on the marker causing it to fall.

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Inertia is the natural tendency of an object to resist change in its state of motion. This is seen in the table cloth magic activity when the table cloth was pulled but the objects on the table didn't move or barely moved at all.  These objects were in rest so they wanted to stay resting.

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An object that is not moving is at rest. This is represented in the table cloth magic activity when everything was set up on the table. Nothing on the table was moving so the objects were at rest.

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You know an object is in motion if it moves in relation to the reference point. This was seen in the hoop and marker activity. When the hoop was pulled out from the marker, the marker fell, and was in motion. The marker fell into the jar.

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Mass is the measure of an objects inertia. This was seen in the table cloth magic activity. When the table cloth was pulled out from the objects, some of the objects moved more than other objects. This is because some objects have more mass than other objects.

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Force is a push or a pull. In the table cloth magic experiment, we pulled the tablecloth in a down direction to yank the cloth out from under the items on the cloth. The cloth was not in motion until an unbalanced force pulled the table cloth.

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An object that isn't moving or not in motion will stay this way until an unbalanced force acts upon the object. Similarly, if  an object is moving or in motion, it will continue moving until an unbalanced force acts upon the object.