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2-Forces and Motion
Gravity and Motion, Newton's Laws of Motion, and Momentum- Eighth Grade Science
| Question | Answer |
|---|---|
| At what rate do objects fall to earth? | 9.8 m/s^2 (9.8 meters/second squared) |
| what is the mathematical equation for the velocity of falling objects? | Δv = g*t |
| terminal velocity | the constant velocity of a falling object when the force of air resistance is equal in magnitude and opposite in direction tot he force of gravity |
| free fall | the motion of a body when only the force of gravity is acting on the body. |
| what is an example of an object in free fall? | an astronaut in space/ a feather in a vacuum |
| projectile motion | the curved path that an object follows when thrown, launched, or otherwise projected near the surface of the earth. |
| Properties of projectile motion | thrown with a horizontal push accelerated downward by gravity does not accelerate horizontally |
| newton's first law of motion | an object at rest stays at rest, and an object in motion remains in motion at a constant speed unless acted on by an unbalanced force. |
| newton's second law of motion |
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