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12 Cards in this Set
- Front
- Back
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What is buoyancy?
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Buoyancy is the upward force that fluid exerts on matter.
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Why does something float?
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An object floats because the buoyant force is equal to the objects weight.
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Why does something sink?
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Something sinks because the weight is greater than the buoyant force.
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What is a vector?
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A vector is an error that shows a force's direction and magnitude.
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What does the length of the vector show?
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The length shows how much force is being applied.
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What does the arrowhead on a vector show?
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The arrowhead shows the direction of the force.
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How do you add a force?
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You add a force by connecting the vectors tip to tail
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How do you subtract a force?
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connecting the vectors tip to tip or tail to tail
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How can a tiny bullet and a large cannon bomb have equal force?
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Bullet: little mass- big acceleration
cannon bomb- big mass- little acceleration. They both end up hitting an object with equal force. |
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Whats an example of an action and a reaction?
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action- air rushes down
reaction- balloon floats up |
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what is newtons 3rd law?
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all forces act in pairs.
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how do you make a fluid more buoyant?
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make it less dense by making it warmer
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