Basic physics concepts covered on the HESI A2 Physics module: motion, forces, energy, and simple machines.
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- What does Newton's first law of motion state?
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An object at rest stays at rest, and an object in motion stays in motion, unless acted on by an outside force.- What does Newton's second law of motion state?
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Force equals mass times acceleration (F = ma).- What does Newton's third law of motion state?
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For every action, there is an equal and opposite reaction.- What is the SI unit of force?
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The newton (N)- What is the definition of speed?
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The distance an object travels per unit of time.- What is the definition of velocity?
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An object's speed in a given direction.- What is the definition of acceleration?
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The rate at which an object's velocity changes over time.- What is the SI unit of acceleration?
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Meters per second squared (m/s^2)- What is the standard value of acceleration due to gravity on Earth?
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About 9.8 meters per second squared- What is the definition of mass?
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The amount of matter in an object.- What is the definition of weight?
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The force of gravity acting on an object's mass.- What is the formula for weight?
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Weight = mass times gravitational acceleration (W = mg)- What is the definition of momentum?
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The quantity of motion an object has, based on its mass and velocity.- What is the formula for momentum?
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Momentum = mass times velocity (p = mv)- What does the law of conservation of momentum state?
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The total momentum of a closed system remains constant if no outside forces act on it.
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