Unit 2 Post Test Review

Front

What is kinetic energy?

Back

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

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How does mass affect kinetic energy?

Back

As mass increases, kinetic energy increases, assuming velocity remains constant. This means heavier objects have more kinetic energy when moving at the same speed as lighter objects.

Front

What happens to kinetic energy when an object's speed increases?

Back

Kinetic energy increases with the square of the speed. If the speed doubles, the kinetic energy increases by a factor of four.

Front

What is the relationship between kinetic energy and temperature?

Back

When kinetic energy is transferred to an object, such as during a collision, it can increase the object's temperature, indicating that some kinetic energy has been converted to thermal energy.

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What is gravitational potential energy?

Back

Gravitational potential energy is the energy an object has due to its position in a gravitational field, calculated using the formula PE = mgh, where m is mass, g is the acceleration due to gravity, and h is height.

Front

How do you calculate kinetic energy?

Back

Kinetic energy (KE) is calculated using the formula KE = 1/2 mv², where m is the mass of the object and v is its velocity.

Front

What is the effect of friction on kinetic energy?

Back

Friction converts kinetic energy into thermal energy, causing a decrease in the kinetic energy of moving objects.

Front

What is the principle of conservation of energy?

Back

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

Front

How does the speed of an object relate to its kinetic energy?

Back

The kinetic energy of an object increases with the square of its speed; thus, a small increase in speed results in a large increase in kinetic energy.

Front

What is the difference between kinetic energy and potential energy?

Back

Kinetic energy is the energy of motion, while potential energy is stored energy based on an object's position or state.