Energy Test Review

Front

What is the Law of Conservation of Energy?

Back

Energy is neither created nor destroyed; it can only be transformed from one form to another.

Front

How do you calculate power?

Back

Power (P) is calculated using the formula P = Work (W) / Time (t).

Front

If a machine produces 400 watts of power and does 2000 joules of work, how long does it take to complete the task?

Back

5 seconds.

Front

What is the formula for potential energy?

Back

Potential Energy (PE) = mass (m) × gravity (g) × height (h).

Front

Calculate the potential energy of a car with a mass of 2,500 kg that is on a hill 100 meters above sea level.

Back

2,450,000 J.

Front

What is mechanical energy?

Back

Mechanical energy is the sum of potential and kinetic energy in a system.

Front

What is kinetic energy?

Back

Kinetic Energy (KE) is the energy of an object in motion, calculated as KE = 1/2 mv².

Front

How do you calculate the height a block can be raised with a given amount of energy?

Back

Height (h) = Energy (E) / Weight (W).

Front

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

Back

The unit of energy is the Joule (J).

Front

What is the relationship between work and energy?

Back

Work done on an object results in a change in energy of that object.