Energy and Kinetic Energy Quiz

Hannah is playing on a swing in the park. At which point in her swing does she have maximum kinetic energy?

• At the highest point on either side

• At the lowest point in the swing

• In the middle of the swing

• When she is at rest

Ethan drops a ball from the top of a hill to the bottom. What happens to the total energy in the system, assuming no energy loss?

• Energy decreases

• Energy increases

• Energy remains constant

• Energy fluctuates

Arjun compresses a spring in a toy car and then releases it. Which form of energy is most relevant when the spring is compressed?

• Gravitational potential energy

• Kinetic energy

• Elastic potential energy

• Thermal energy

Elijah is observing a basketball as it bounces on the court. To model the energy transformation in the bouncing ball, which combination of energies would he consider?

• Kinetic and potential energy

• Kinetic and thermal energy

• Gravitational and chemical energy

• Kinetic and electrical energy

Avery is riding a bicycle, and the mass of the bicycle is doubled while maintaining the same speed. How does the kinetic energy of the bicycle change?

• It doubles

• It quadruples

• It remains the same

• It is halved

David is riding his bicycle, and the total mass of David and the bicycle is 5 kg. If he is moving at a speed of 10 m/s, what is his kinetic energy?

• 50 Joules

• 250 Joules

• 500 Joules

• 1000 Joules

Charlotte and Olivia are playing with toy cars. Charlotte's car has a mass of 3 kg and is moving at a velocity of 2 m/s, while Olivia's car has a mass of 4 kg and is moving at a velocity of 3 m/s. What is the total kinetic energy of the system?

• 27 Joules

• 36 Joules

• 46 Joules

• 56 Joules

Mia is lifting a book to place it on a higher shelf. When calculating the gravitational potential energy (PE=mghPE = mghPE=mgh) of the book, what happens if the height of the shelf is increased?

• The potential energy decreases

• The potential energy increases

• The potential energy stays the same

• The kinetic energy increases

Isla is studying a system where a car engine converts fuel into both thermal and mechanical energy. How should she model the energy flow in this system?

• Using only kinetic energy equations

• By applying both KE=12mv2KE = \frac{1}{2}mv^2KE=21mv2 and PE=mghPE = mghPE=mgh

• Using a diagram that shows heat transfer and motion

• Using a simulation that only accounts for heat

Grace and Benjamin are discussing how heat moves in their kitchen. Grace says that when they leave a hot cup of coffee on the counter, it eventually cools down. Which principle of thermodynamics does this illustrate?

• Energy is always conserved

• Energy can only be transferred from colder to hotter objects

• The total energy in a closed system remains constant

• Energy spreads out from areas of high concentration to low concentration