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9 Cards in this Set
- Front
- Back
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Explain this law - balanced forces mean no change in velocity. |
So long as the forces on an object are all balanced, then it'll just stay still, or else if it's already moving it'll just carry on at the same velocity - so long as the forced are all balanced. |
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What are three points to remember when thinking about the first rule of motion? |
1. A constant velocity means a balanced force. 2. Objects do not need an overall force to keep them moving 3. The resultant force is zero at constant steady speed. |
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Explain this law - A resultant force means acceleration |
If there is an unbalanced force then the object will accelerate in that direction. |
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What are three things to remember about the second law of motion? |
1. Unbalanced force produces wither acceleration or deceleration. 2. There are five forms of acceleration 3. On a force diagram, the arrows will be unequal |
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What are the five forms of acceleration? |
Starting, stopping, speeding up, slowing down and changing direction |
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How does force affect acceleration? |
The bigger the force, the greater the acceleration/deceleration |
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How does mass affect acceleration? |
The bigger the mass, the small the acceleration. |
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Explain the law of the reaction of forces. |
If object A exerts a force on object B then object B exerts the exact same force on object A. |
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What are 3 important things to remember about the third law of motion? |
1. If you push something, it pushes back just as hard 2. As soon as you stop pushing, so does the other object. 3. The forces may be equal but the masses are often different thus creating movement |
