Physics - 8th Grade

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What is potential energy?

Back

Potential energy is the energy stored in an object due to its position or configuration. It is highest when the object is at rest at a height.

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What is kinetic energy?

Back

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

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What is the relationship between force, mass, and acceleration?

Back

According to Newton's second law, force (F) is equal to mass (m) times acceleration (a), expressed as F = ma.

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What is the law of conservation of energy?

Back

The law of conservation of energy states that energy cannot be created or destroyed, only transformed from one form to another.

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What is Newton's third law of motion?

Back

Newton's third law states that for every action, there is an equal and opposite reaction.

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How do you calculate average speed?

Back

Average speed is calculated by dividing the total distance traveled by the total time taken, expressed as speed = distance/time.

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What is the unit of force in the International System of Units (SI)?

Back

The unit of force in SI is the Newton (N).

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What is acceleration?

Back

Acceleration is the rate of change of velocity of an object, typically measured in meters per second squared (m/s²).

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What is the difference between mass and weight?

Back

Mass is the amount of matter in an object, measured in kilograms (kg), while weight is the force exerted by gravity on that mass, measured in Newtons (N).

Front

What is gravitational potential energy?

Back

Gravitational potential energy is the potential energy held by an object because of its height above the ground, calculated as PE = mgh, where m is mass, g is acceleration due to gravity, and h is height.