NC Physical Science Final Exam Review

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What is Newton's 2nd Law of Motion?

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Newton's 2nd Law of Motion states that the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass. Formula: F = ma (Force = mass x acceleration).

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What are unbalanced forces?

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Unbalanced forces are forces acting on an object that are not equal in size and opposite in direction, causing the object to accelerate in the direction of the net force.

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What is thermal energy?

Back

Thermal energy is the total kinetic and potential energy of all the particles in an object, which is related to its temperature.

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What is a scalar quantity?

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A scalar quantity is a physical quantity that is fully described by a magnitude (numerical value) alone, such as mass or temperature.

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What is work in physics?

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Work is done when a force causes an object to move in the direction of the force. It is calculated as Work = Force x Distance.

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What is Newton's 1st Law of Motion?

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Newton's 1st Law of Motion states that an object at rest will stay at rest, and an object in motion will stay in motion at a constant velocity unless acted upon by a net external force.

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What is Newton's 3rd Law of Motion?

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Newton's 3rd Law of Motion states that for every action, there is an equal and opposite reaction.

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What is the difference between mass and weight?

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Mass is the amount of matter in an object and is measured in kilograms, while weight is the force exerted by gravity on that mass and is measured in newtons.

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What is kinetic energy?

Back

Kinetic energy is the energy of an object due to its motion, calculated as KE = 1/2 mv² (where m is mass and v is velocity).

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What is potential energy?

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Potential energy is the stored energy of an object due to its position or state, such as gravitational potential energy, which depends on height.