Energy

Which type of energy has to do with objects in motion?

• Potential

• Kinetic

A 10 kg cat runs across the room with a speed of 5 m/s. How much kinetic energy does the cat have?

• 50 Joules

• 2 Joules

• 250 Joules

• 125 Joules

A 2 kg book is sitting on a shelf 5 meters from the ground. How much gravitational potential energy does the book have? (To make things easier for now, use g = 10 m/s²)

• 2 Joules

• 10 Joules

• 50 Joules

• 100 Joules

What is stored energy?

• Potential Energy

• Kinetic Energy

• Thermal Energy

• Sound Energy

What is used to represent the spring constant of a spring?

• m

• x

• k

• v

What is used to represent the displacement of a spring?

• m

• x

• k

• v

A spring with a spring constant of 1.98 is stretched 0.62 m. What is the potential energy of the spring?

• 0.6138 Newtons

• 0.6138 joules

• 0.381 Newtons

• 0.381 joules

The total mechanical energy of a pendulum is 8.91 joules. In it's current position he pendulum has 5.49 joules of potential energy. How much kinetic energy does the pendulum have in the same position?

HINT: Total Mechanical Energy = potential energy + kinetic energy

• 3.42 meters

• 3.42 joules

• 14.4 joules

• 14.4 meters