Physics Midterm Review

Front

What is Kinetic Energy?

Back

Kinetic Energy is the energy an object possesses due to its motion, calculated using the formula KE = 1/2 mv², where m is mass and v is velocity.

Front

How do you calculate Kinetic Energy for a moving object?

Back

Kinetic Energy (KE) = 1/2 * mass (m) * velocity (v) squared (v²).

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What is the formula for calculating Net Force?

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Net Force (F) = mass (m) * acceleration (a).

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

Back

According to Newton's second law, the net force acting on an object is equal to the mass of the object multiplied by its acceleration (F = ma).

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What is Power in physics?

Back

Power is the rate at which work is done or energy is transferred, calculated as Power (P) = Work (W) / Time (t).

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How do you calculate Power from energy used?

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Power (P) = Energy (E) / Time (t). For example, if a light bulb uses 6000 joules in 1 minute, its power is 100 Watts.

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What happens to objects in free fall in a vacuum?

Back

In a vacuum, all objects fall at the same rate regardless of their mass, due to the absence of air resistance.

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What is the effect of negative velocity and negative acceleration on an object's motion?

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An object with negative velocity and negative acceleration will speed up in the negative direction.

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What is the difference between speed and velocity?

Back

Speed is a scalar quantity representing how fast an object is moving, while velocity is a vector quantity that includes both speed and direction.

Front

What is the principle of conservation of energy?

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