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10 Cards in this Set
- Front
- Back
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How to shows forces using a diagram |
Free body diagrams-objects and box, arrow direction = force direction, arrow size = force size, label arrows |
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What does unbalanced and balanced forces mean |
Unbalanced forces means opposite forces are not the same size, causing objects to accelerate/decelerate Balanced forces means opposite forces are the same, causing an object to remain stationary or travel at a constant velocity (terminal velocity) |
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What is the resultant force |
The total of all the forces added up |
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What is Newton’s first law? |
“If no external forces act on a body it will continue at a constant velocity” |
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What is Newton’s second law? |
Force/ mass x acceleration For example: 1N is the force needed to accelerate a mass of 1kg by 1 m/s2 |
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How to find weight |
Weight/mass x gravity GRAVITY is a natural phenomenon which causes all things with a mass are pulled together. It is measured in N/kg. Earths average surface gravity = 10 N/kg MASS is the amount of matter in an object and will stay the same everywhere on the universe. It is measured in kg WEIGHT is the force (pull) of gravity of an object. It is measured in Newtons |
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What is Newton’s third law? |
Force= mass x acceleration |
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How to calculate acceleration |
Acceleration = change in velocity/ time |
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How to find momentum |
Momentum/ mass x velocity Momentum units: kg m/s Velocity units: m/s |
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How find force using momentum and time |
Force = change in momentum/ change in time Basically, force is equal to the rate of change of momentum |
