Mechanical Energy

What is the definition of work?

• the energy that an object has because of its position, shape, or chemical composition

• the sum of an object's kinetic and potential energy

• the transfer of energy to an object by using a force that causes the object to move in the direction of the force

What is the definition of potential energy?

• the energy that an object has because of its position, shape, or chemical composition

• the sum of an object's kinetic and potential energy

• the transfer of energy to an object by using a force that causes the object to move in the direction of the force

What is the definition of mechanical energy?

• the energy that an object has because of its position, shape, or chemical composition

• the sum of an object's kinetic and potential energy

• the transfer of energy to an object by using a force that causes the object to move in the direction of the force

What is the transformation of mechanical energy in a ball when it is thrown straight up and then comes back down?

• Potential energy as the ball is thrown, kinetic as it is at the top, potential as it returns.

• Kinetic energy as the ball is thrown, potential as it is at the top, potential as it returns.

• Kinetic energy as the ball is thrown, potential as it is at the top, kinetic as it returns.

Is mechanical energy conserved as a playground swing moves?

• Yes

• No

What are the two forms of energy that make up mechanical energy?

• Chemical

• Potential

• Kinetic

• Electrical

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-2

What can you determine about mechanical energy from this graph?

• The pendulum loses mechanical energy

• Kinetic energy stays constant throughout the graph

• Mechanical energy is conserved throughout the graph

• Potential energy stays constant throughout the graph

How does this differ from a real-world example?

• Kinetic energy would stay constant

• Potential energy would stay constant

• Mechanical energy of the pendulum system would decrease

• Mechanical energy of the pendulum system would increase