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30 Week Assessment
TEST
| Question | Answer |
|---|---|
| What determines how difficult it is to stop an object? | Momentum |
| The rate of change in velocity is called | acceleration |
| What is used for a comparison when motion is described? | Frame of Reference |
| The rate at which an object moves is its | speed |
| Change in position in a certain amount of time is | motion |
| Speed in a given direction is | velocity |
| A negative acceleration is called | deceleration |
| The velocity of an object changes if | |
| When deceleration occurs, velocity | Decreases |
| An example of constantly changing velocity is | Circular Motion |
| Even when slowly moving a train cannot stop suddenly because of its | Large Momentum |
| Speed that does not change is called | Constant |
| The Law of Conservation of Momentum momentum states that | |
| A distance-time graph for acceleration is always a | Curved |
| When an object slows, | it's momentum decreases |
| Force is necessary to | move an object |
| When forces are balanced, the motion of the object | is zero |
| Which of the following is used to reduce friction? | |
| Which of the following is not an example of fluid friction? | Motor oil |
| Friction produced by wheels or ball bearings is called | |
| What friction has the highest resistance? | |
| An object at rest will remain at rest is explained in Newton’s | 1st Law |
| Newton’s Second Law of Motion relates to | |
| Kg x m/s/s = | Momentum |
| Working with force weight is measured in | mass |
| Newton’s Third Law of Motion describes | |
| Forces act in pairs falls under Newton’s | 9.8 m/s |
| What is the value of gravitational acceleration. | Increases |