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Science Vocab Ch. 2
Motion, Forces, and Newton's Laws; Lessons 1 - 3
| Term | Definition |
|---|---|
| Motion | ... is the process of changing position. |
| Reference Point | The starting point you use to describe the motion or the position of an object is called the ... |
| Distance | ... is the total length of your path. |
| Displacement | Your ... is the distance between your initial, or starting, position and your final position. |
| Speed | ... is the distance an object moves divided by the time it took to move that distance. |
| Velocity | ... is the speed and direction of an object's motion. |
| Acceleration | ... is the measure of the change in velocity during a period of time. |
| Force | A push or pull on an object is a ... |
| Contact Force | A ... is apush or a pull applied by one object to another object that is touching it. |
| Noncontact Force | A force that pushes or pulls a n object without touching it is a ... |
| Friction | ... is a contact force that resists the sliding motion between two objects that are touching. |
| Gravity | ... is a noncontact attractive force that exists between all objects that have mass. |
| Balanced Forces | When the net force of an object is 0 N, the forces acting on it are ... |
| Unbalanced Forces | When the net force acting on an object is not 0, the forces acting on the object are ... |
| Inertia | The tendency of an object to resist a change in motion is called ... |
| Newton's First Law of Motion | ... states that if the net force acting on an object is zero, the motion of the object does not change. |
| Newton's Second Law of Motion | ... states that the acceleration of an object is equal to the net force applied to the object divided by the object's mass. |
| Newton's Third Law of Motion | ... says that when one object exerts a force on a second object, the second object exerts a force of the same size, but in the opposite direction, on the first object. |
| Force Pair | When two objects exert forces on each other, the two forces are a ... |