Using Potential and Kinetic Energy Quick Check

Question

Science 8 Q1 / Energy of Motion

Which statement correctly identifies the relative levels of kinetic and potential energy in a hydroelectric dam?(1 point)
Responses

Kinetic energy is highest at the top; potential energy is highest at the bottom.

Kinetic and potential energy are both highest at the top.

Kinetic and potential energy are both highest at the bottom.

Kinetic energy is highest at the bottom; potential energy is highest at the top.

Two different rivers have drops that are the same height. In river A, this section of the river is a waterfall. In river B, this section has a hydroelectric dam. In what way does the energy differ between the drops in the two rivers?(1 point)
Responses

The potential energy of the water would be less at the top of the drop in river A than in river B.

The kinetic energy of the water would be less at the bottom of the drop in river A than in river B.

The potential energy of the water would be greater at the top of the drop in river A than in river B.

The kinetic energy of the water would be greater at the bottom of the drop in river A than in river B.

The turbines can be seen inside this hydroelectric dam. Why are they located at that particular height?

(1 point)
Responses

There is a large drop, so the water will have a lot of potential energy to transfer to the turbine.

There is a large drop, so the water will have a lot of kinetic energy to transfer to the turbine.

There is a small drop, so the water will still have a lot of potential energy to transfer to the turbine.

There is a small drop, so the water will still have a lot of kinetic energy to transfer to the turbine.

A team of engineers is working with a wind turbine. The team is working with a model and testing different angles for the blade of the wind turbine. What would the research question be for this team?(1 point)
Responses

Which angle converts the largest percentage of potential energy from the wind into kinetic energy of the turbine?

Which angle converts the largest percentage of potential energy from the wind into potential energy of the turbine?

Which angle converts the largest percentage of kinetic energy from the wind into potential energy of the turbine?

Which angle converts the largest percentage of kinetic energy from the wind into kinetic energy of the turbine?

what is the answer to all 4 questions

Answer 1

In a hydroelectric dam, the correct statement is:

- Kinetic energy is highest at the bottom; potential energy is highest at the top.

In the two different rivers with drops of the same height, the difference in energy is:

- The potential energy of the water would be greater at the top of the drop in river A than in river B.

The reason the turbines are located at a particular height in a hydroelectric dam is:

- There is a large drop, so the water will have a lot of potential energy to transfer to the turbine.

The research question for the team working with a wind turbine would be:

- Which angle converts the largest percentage of kinetic energy from the wind into kinetic energy of the turbine?