Physics Energy 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) is calculated using the formula KE = 1/2 mv², where m is the mass of the object in kilograms and v is its velocity in meters per second.

Front

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

Back

The unit of energy in the SI system is the Joule (J).

Front

What is Power in physics?

Back

Power is the rate at which work is done or energy is transferred, calculated as Power = Work / Time.

Front

How does time affect power output?

Back

If two people do the same amount of work, the one who takes less time is more powerful, as power is inversely related to time.

Front

What is the relationship between mass, velocity, and kinetic energy?

Back

Kinetic energy increases with the square of the velocity and is directly proportional to the mass of the object.

Front

How do you determine which object has the most kinetic energy?

Back

To compare kinetic energy, calculate KE for each object using KE = 1/2 mv² and compare the results.

Front

What is the formula for gravitational potential energy?

Back

Gravitational Potential Energy (PE) is calculated using the formula PE = mgh, where m is mass, g is acceleration due to gravity, and h is height.

Front

How can you find the height of an object using energy principles?

Back

You can find the height by rearranging the potential energy formula: h = PE / (mg), where PE is potential energy.

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.