Energy Test Review

What unit is used to measure energy?

• Newtons (N)

• Joules (J)

• Meters per Second Squared (m/s²)

• Kilograms

Which of the following best describes the law of conservation of energy?

• Energy cannot be created but can be destroyed and can change form.

• Energy cannot be created or destroyed and cannot change form.

• energy can be crated but it cannot be destroyed and cannot change form.

• Energy cannot be created or destroyed, but energy can change form.

What is kinetic energy?

• Energy of motion.

• Stored energy

• Energy that comes from the stretching of objects

• A type of potential energy

Which of the following is not a type of potential energy?

• Gravitational Potential Energy

• Chemical Potential Energy

• Elastic Potential Energy

• Thermal Potential Energy

What two factors determine an object's gravitational potential energy (GPE)?

• Mass and Speed

• Mass and Height Above the Ground

• Speed and Height Above the Ground

• Mass and Weight

What is mechanical energy?

• The total of an object's radiant and thermal energy

• The total of an object's kinetic and thermal energy

• The total of an object's elastic and gravitational potential energy

• The total of an object's kinetic and potential energy

When a roller coaster goes down a hill, what energy conversion is occurring?

• Kinetic energy to gravitational potential energy

• Gravitational potential energy to chemical potential energy

• Chemical potential energy to kinetic energy

• Gravitational potential energy to kinetic energy

Calculate the potential energy of a car with a mass of 2,500 kg that is on a hill 100 meters above sea level. (g = 10 Nkg^-1)

• 250,000 J

• 2,500,000 J

• 25,000,000 J

• 250 J

Lilly's cat ran through your yard. The cat has a mass of 5 kg. He is running at a speed of 3 m/s. What is the kinetic energy of the cat as he runs? (KE = 1/2mv²)

• 8.5 J

• 45 J

• 7.5 J

• 22.5 J

Alice kicks a soccer ball with a mass of 2.1 kg. The ball leaves the ground moving 30 meters per second. What is the kinetic energy of the soccer ball? (KE = 1/2mv²)

• 567 J

• 900 J

• 945 J

• 30 J