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 bottom; potential energy is highest at the top.
Kinetic energy is highest at the bottom; potential energy is highest at the top.
Kinetic and potential energy are both highest at the bottom.
Kinetic and potential energy are both highest at the bottom.
Kinetic and potential energy are both highest at the top.
Kinetic and potential energy are both highest at the top.
Kinetic energy is highest at the top; potential energy is highest at the bottom.
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 greater at the top 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 potential energy of the water would be less at the top of the drop in river A than in river B.
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 greater at the bottom 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 kinetic energy of the water would be less at the bottom of the drop in river A than in river B.
Use the diagram to answer the question.
The water in the dam is stored at the top. This stored water flows into the turbine, causing it to rotate. The turbine, in turn, rotates the shaft of a generator that produces electricity.
The turbines can be seen inside this hydroelectric dam. Why are they located at that particular height?
(1 point)
Responses
There is a small drop, so the water will still 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 kinetic energy to transfer to the turbine.
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 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 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 potential energy to transfer to the turbine.
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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 kinetic 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?
Which angle converts the largest percentage of kinetic energy from the wind into kinetic energy of the turbine?
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 kinetic energy of the turbine?
Which angle converts the largest percentage of potential energy from the wind into potential energy of the turbine?
1 What is the energy associated with the motion of an object?(1 point)
Responses
chemical energy
chemical energy
thermal energy
thermal energy
kinetic energy
kinetic energy
potential energy
kinetic energy
What is the energy associated with the motion of an object?(1 point)
Responses
chemical energy
chemical energy
thermal energy
thermal energy
kinetic energy
kinetic energy
potential energy
kinetic energy
As an object falls, how are kinetic and potential energy related?(1 point)
Responses
These are different forms of energy that will increase or decrease independent of each other.
These are different forms of energy that will increase or decrease independent of each other.
Both potential energy and kinetic energy will increase equally as the object accelerates.
Both potential energy and kinetic energy will increase equally as the object accelerates.
Potential energy will decrease in an amount equal to the increase in kinetic energy.
Potential energy will decrease in an amount equal to the increase in kinetic energy.
The amount of potential energy and kinetic energy each will remain the same.
Potential energy will decrease in an amount equal to the increase in kinetic energy.
Energy of Motion Online Practice
Complete this assessment to review what you’ve learned. It will not count toward your grade.
3 of 113 of 11 Items
Question
Use the table to answer the question.
Object Mass (grams)
table tennis ball 2.7
baseball 147.0
small rock 248.2
penny 2.5
A student drops the four objects listed from a height of 2 meters into a bucket of water. Which object will have the greatest kinetic energy?
(1 point)
Responses
table tennis ball
table tennis ball
penny
penny
baseball
baseball
small rock
small rock
penny
What is one way to decrease the kinetic energy of an object?(1 point)
Responses
Decrease its speed.
Decrease its speed.
Decrease its volume.
Decrease its volume.
Increase its mass.
Increase its mass.
Increase its weight.
Decrease its speed.
Two objects are moving at the same speed. Which one has more kinetic energy?(1 point)
Responses
the object that is higher above ground level
the object that is higher above ground level
the object with the greater volume
the object with the greater volume
the object with the greater mass
the object with the greater mass
the object that is made of more dense material
the object with the greater mass
A child is racing several springy toys down the stairs. Springy toys are cylinders of coiled wire that bend and flex, and can “hop” down stairs one step at a time. The child places one on the bottom stair, one in the middle of the stairs, and one on the top of the stairs. Which one has the greatest potential energy and why?(1 point)
Responses
the one on the bottom stair, because it has to cover the shortest distance to get to the bottom of the stairs
the one on the bottom stair, because it has to cover the shortest distance to get to the bottom of the stairs
the one in the middle of the stairs, because it has a balanced mix of potential and kinetic energy from being placed in the middle
the one in the middle of the stairs, because it has a balanced mix of potential and kinetic energy from being placed in the middle
all have the same potential energy, because they are all travelling an equal distance of one step at a time
all have the same potential energy, because they are all travelling an equal distance of one step at a time
the one at the top of the stairs, because potential energy increases with height and it is at the top of the stairs
the one at the top of the stairs, because potential energy increases with height and it is at the top of the stairs
A 16-pound bowling ball strikes a 3.5-pound bowling pin. The pin is moving very fast after the collision. It has a large increase in velocity as a large amount of kinetic energy is transferred to it. Where does the energy come from?(1 point)
Responses
It is lost by the bowling ball, which would have an equal decrease in velocity.
It is lost by the bowling ball, which would have an equal decrease in velocity.
It is lost by the bowling ball, which would have a smaller decrease in velocity.
It is lost by the bowling ball, which would have a smaller decrease in velocity.
It is lost by the bowling ball, which would have no change in velocity.
It is lost by the bowling ball, which would have no change in velocity.
It is lost by the bowling ball, which would have a larger decrease in velocity.