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Science Test
| Question | Answer |
|---|---|
| What is the result of an unbalanced force? | Motion |
| How do you know if an object is in motion? | Its position changes |
| Speed and velocity are a measure of how fast an object moves; however, velocity includes a _____ | direction |
| An object is in free fall if _____ is the only force acting on the object. | Gravity, actual rate is 9.8 |
| Acceleration due to gravity is ___ m/s2 (10 m/s2). | 9.8 m/s |
| Assuming gravity is the only force acting on an object, ALL OBJECTS FALL AT THE SAME ____ (NOT NECESSARILY THE SAME SPEED) | acceleration or rate |
| ____ was the first to study gravity and its effects. | Issac Newton |
| ____Friction- two objects touch, one or neither does not move | Static |
| _____Friction-two objects touch and one slides past another | Sliding |
| _____-two objects touch and one rolls past another | Rolling |
| Mass does not change from location to location; however, ___ does (because of gravity). | weight |
| Objects fall to Earth’s surface because of Earth’s large _____. (it’s really big!) | Gravitational Pull |
| Gravitational pull depends on ___ and _____. | Mass and distance |
| Know: ____ forces do not CHANGE motion. (net force is 0 N) | Balenced |
| Gravity is a ____. Every object exerts a gravitational force on every other object. | force |
| A force is a ___ or ___ and these forces cause motion! | push or pull |
| ______ is the combination of all of the forces acting on an object. Know how to determine net force! | The net force |
| ____ is a force that slows motion. | Friction |
| Acceleration is a change in velocity’s rate. Acceleration is a change in ___ or ____ (or both). | time or direction |
| Deceleration is a decrease in ____. (Know what this looks like on a velocity/time graph) | speed |
| What does Newton’s first law state? | Every object at rest wants to stay in rest and objects in motion want to stay in motion. |
| What does Newton’s second law state? | The unbalanced force acting on an object equals the object’s mass times its acceleration. |
| What does Newton’s third law state? | Every action as an equal and opposite reaction |
| _____ is the tendency of an object to resist a change in motion. This explains why seatbelts are in cars.) | Intertia |
| Objects move in the direction of the greatest _____ | force |
Created by:
StellaW11
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