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Grade
10/10

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When an object is balanced, equal forces are acting on it from opposite directions so that it stays still and the net force is zero. An example of balanced force is in the Hoop and Marker activity, the hoop was pushing the marker up and gravity was pulling the marker down, so the marker did not move.

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An unbalanced force is one that changes the position, speed or direction of an object when applied. In the Table Cloth Magic activity, unbalanced force was applied by the table cloth to the objects on the table cloth because when the table cloth was pulled, it caused the objects to move or fall.

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Inertia is the tendency of all objects to resist any change in motion. An example of inertia in Table Cloth Magic was that when the table cloth was pulled from under the objects, the objects with bigger inertia like the large graduated cylinder and the cup with the weight in it, would not move as much as one of the lighter objects, like the small graduated cylinder or the dish.

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When an object is at rest, it is not moving. In the Table Cloth Magic activity, the objects on the table cloth were not moving and at rest until the table cloth was pulled from under them.

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When an object is in motion, the object is moving. In the Hoop and Marker activity, when the hoop was pulled from under the marker, the marker was in motion because it was moving and falling towards the jar.

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Mass is the measure of inertia. An example of mass in Table Cloth Magic was that when the table cloth was pulled from under the objects, the objects with more mass (large inertia) would not move much or at all. The objects with very little mass (little inertia) moved a lot.

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Force is a push or a pull. Force was demonstrated in the Hoop and Marker activity because when the marker was on top of the hoop, to complete the activity I had to pull the hoop from under the marker, which is force.  This can be connected back to Newton's first law because when force has not been applied to an object it stays at rest, but when force is applied, the object is in motion

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Newton's first law is the fact that when an object is not in motion, it stays still. When an object is moving, it moves at a constant speed and in a straight direction unless it comes in contact with an unbalanced force.