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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 |