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33 Cards in this Set
- Front
- Back
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Newton's Third Law |
For every action, there is an equal but opposite reaction. Ex. A Rocket ship taking off |
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Newton's Second Law |
Force= Mass x Acceleration Mass= Force/Acceleration Acceleration= Force/Mass |
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Inertia |
The tendency for an object to stay at rest. |
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Newton's 1st Law/Law of Inertia |
This Law states that an object at rest or an object in Motion, will stay at rest or in motion, unless acted upon by an outside force. ex. a soccer ball will not move, until it is kicked. |
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Forces can only be added together if |
Forces are going in the same direction |
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The greater the mass of an object |
the more inertia the object has |
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A hammer strikes a nail, and the nail exerts an equal but opposite force |
Newton's 3rd Law |
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Weight |
A force due to gravity |
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Speed = distance divided by? |
time |
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Reference point |
a stationary object used to find the relative position of an object |
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Gravity |
A force that pulls something downward |
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SI unit for acceleration |
m/s2 |
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Mass |
the amount of matter in an object |
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Friction |
The force one object exerts on another when the two rub together |
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The law of universal gravitation |
States that any two objects in the universe that have mass, without exception, attract each other |
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A push or a pull is called |
A force |
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When your bike tires roll along the road as you ride, they are exhibiting |
Rolling friction |
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Fluid Friction |
Example: adding oil to lubricate a car engine |
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When you know the speed and and direction of an object's motion you know the |
velocity |
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Sliding friction |
Hockey puck moving across the ice |
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If a bicyclist travels 30 kilometers in two hours, the average speed is |
15 km/h |
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When an object's position relative to another object is changing, |
it is in motion |
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An object changing direction is an example of |
velocity |
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On a graph showing distance versus time, a horizontal line represents an object that is |
not moving at all |
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How would you compare the acceleration of a 5 kg object to the acceleration of a 3 kg object? |
An object with less mass will have a higher acceleration, while an object with more mass will require more force to move it. |
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What does the head of an arrow indicate? |
Direction |
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Speed = |
Distance / Time |
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Time = |
Distance / Speed |
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Distance= |
Speed x Time |
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A car that travels 500 kilometers in 5 hours has a speed of |
100 km/h |
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A motorcycle travels 80 kilometers in 4 hours. What is the speed? |
20 km/h |
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A runner running at a speed of 30 km/hr for 5 hours traveled how far? |
150km |
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How long does it take to drive 70 km at a rate of 35 km/h? |
2 hours |
