A ball is held at the top of a table. The person holding the ball drops it, and the ball is allowed to fall toward Earth. Answer the following questions about the ball.
a. When the ball is held at the top of the table (before being dropped), what type of energy does the ball have?
(1 point)
Responses
motion energy
motion energy
electrical energy
electrical energy
kinetic energy
kinetic energy
potential energy
potential energy
As the ball is falling, what is happening to its energy?(1 point)
Responses
potential energy converts to kinetic energy as it falls
potential energy converts to kinetic energy as it falls
potential energy stays the same as it falls
potential energy stays the same as it falls
kinetic energy stays the same as it falls
kinetic energy stays the same as it falls
kinetic energy converts to potential energy as it falls
potential energy converts to kinetic energy as it falls
Just before the ball hits the ground, how are its speed and kinetic energy related?(1 point)
Responses
Speed is at its highest value, while kinetic energy is at its lowest value.
Speed is at its highest value, while kinetic energy is at its lowest value.
Both speed and kinetic energy are at their greatest values.
Both speed and kinetic energy are at their greatest values.
Speed is at its lowest value, which kinetic energy is at its highest value.
Speed is at its lowest value, which kinetic energy is at its highest value.
Both speed and kinetic energy are at their lowest values.
Both speed and kinetic energy are at their greatest values.
A student is testing how mass impacts kinetic energy. From the same height on a diving board, she drops two balls into a swimming pool. One ball has a bigger mass than the other.
Question 1: How would the splashes of the two balls compare?
(1 point)
Responses
1) The balls would make splashes of the same size.
2) The size of the splash is independent of the mass of the ball.
3) The ball with the higher mass would make a bigger splash.
4) The ball with the lower mass would make a bigger splash.
Question 2: How does the mass of a falling object impact the object's kinetic energy?(1 point)
Responses
1) An increase in mass causes an increase in kinetic energy.
2) Mass does not impact kinetic energy.
3) A decrease in mass causes an increase in kinetic energy.
4) An increase in mass causes a decrease in kinetic energy.
Question 3: What happens to the kinetic energy of a ball when it hits the water?(1 point)
1) Overall, kinetic energy is gained.
2) Overall, kinetic energy is lost.
3) All of the kinetic energy is kept by the ball.
4) Some of the energy is transferred to the water.
Question 1: The ball with the higher mass would make a bigger splash.
Question 2: An increase in mass causes an increase in kinetic energy.
Question 3: Some of the energy is transferred to the water.
he image shows the positions of a falling ball that was dropped from 10 meters high.
a. At which position is the potential energy the greatest?
(1 point)
Responses
10 m
10 m
8 m
8 m
5 m
5 m
0 m
0 m
Question 2
b. At what position is the kinetic energy the greatest?(1 point)
Responses
10 m
10 m
just below 10 m
just below 10 m
just above 0 m
just above 0 m
0 m
0 m
Question 3
c. What is happening to potential energy as the ball is falling?(1 point)
Responses
Potential energy is decreasing.
Potential energy is decreasing.
Potential energy is increasing.
Potential energy is increasing.
Potential energy is staying the same.
Potential energy is staying the same.
It is impossible to tell.
It is impossible to tell.
Question 4
d. What is happening to kinetic energy as the ball is falling?(1 point)
Responses
Kinetic energy is decreasing.
Kinetic energy is decreasing.
Kinetic energy is increasing.
Kinetic energy is increasing.
Kinetic energy is staying the same.
Kinetic energy is staying the same.
It is impossible to tell.
It is impossible to tell.
Question 5
e. What is happening to total energy as the ball is falling?(1 point)
Responses
Total energy is decreasing.
Total energy is decreasing.
Total energy is increasing.
Total energy is increasing.
Total energy is staying the same.
Total energy is staying the same.
It is impossible to tell.
a. At position 10 m, the potential energy is the greatest.
b. Just above 0 m, the kinetic energy is the greatest.
c. Potential energy is decreasing as the ball is falling.
d. Kinetic energy is increasing as the ball is falling.
e. Total energy is staying the same as the ball is falling.
Makayla and Aaron are watching a basketball game after school. As they observe different basketballs in the gym, they think about what they learned in class earlier that day. Help them complete these sentences to explain what they learned.(4 points)
a. Some objects have energy due to their positions above the ground. This is called
. When an object gets higher above the ground, this kind of energy
.
b. Some objects have energy due to their motion. This is called
. When an object's speed gets faster, this kind of energy
.
Question 2
Aaron and Makayla want to determine what type of energy each basketball has.
c. Identify the type or types of energy described in each situation listed below.
You might click only one answer in each row, or you might click both answers in a row.
(3 points)
potential energy kinetic energy
One basketball is stored on a shelf about 4 feet high.
potential energy – One basketball is stored on a shelf about 4 feet high.
kinetic energy – One basketball is stored on a shelf about 4 feet high.
One basketball is rolling on the floor.
potential energy – One basketball is rolling on the floor.
kinetic energy – One basketball is rolling on the floor.
One basketball is falling through the hoop near the top of the basketball goal.
potential energy – One basketball is falling through the hoop near the top of the basketball goal.
kinetic energy – One basketball is falling through the hoop near the top of the basketball goal.
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a. Some objects have energy due to their positions above the ground. This is called potential energy. When an object gets higher above the ground, this kind of energy increases.
b. Some objects have energy due to their motion. This is called kinetic energy. When an object's speed gets faster, this kind of energy increases.
c.
- One basketball is stored on a shelf about 4 feet high: potential energy
- One basketball is rolling on the floor: kinetic energy
- One basketball is falling through the hoop near the top of the basketball goal: both potential and kinetic energy
Question
Sandra and her dad go to the grocery story. As they do their shopping, Sandra's dad asks her about her homework. Sandra remembers that she is supposed to make a list of "real world" examples of energy transfer.
Which of the following could be included on a list of examples showing an energy transfer to an object?
(4 points)
This DOES show an energy transfer to an object. This does NOT show an energy transfer to an object.
Sandra slides a gallon of milk out of the way to get a colder gallon from the back of the shelf.
This DOES show an energy transfer to an object. – Sandra slides a gallon of milk out of the way to get a colder gallon from the back of the shelf.
This does NOT show an energy transfer to an object. – Sandra slides a gallon of milk out of the way to get a colder gallon from the back of the shelf.
Sandra's dad stands still while he thinks about what is on the grocery list.
This DOES show an energy transfer to an object. – Sandra's dad stands still while he thinks about what is on the grocery list.
This does NOT show an energy transfer to an object. – Sandra's dad stands still while he thinks about what is on the grocery list.
Sandra's dad pushes the grocery cart to make it start moving.
This DOES show an energy transfer to an object. – Sandra's dad pushes the grocery cart to make it start moving.
This does NOT show an energy transfer to an object. – Sandra's dad pushes the grocery cart to make it start moving.
Sandra sees a new kind of breakfast pastry sitting on a high shelf.
This DOES show an energy transfer to an object. – Sandra sees a new kind of breakfast pastry sitting on a high shelf.
This does NOT show an energy transfer to an object. – Sandra sees a new kind of breakfast pastry sitting on a high shelf.
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- Sandra slides a gallon of milk out of the way to get a colder gallon from the back of the shelf: This DOES show an energy transfer to an object.
- Sandra's dad stands still while he thinks about what is on the grocery list: This does NOT show an energy transfer to an object.
- Sandra's dad pushes the grocery cart to make it start moving: This DOES show an energy transfer to an object.
- Sandra sees a new kind of breakfast pastry sitting on a high shelf: This does NOT show an energy transfer to an object.
Joaquin and Susanna are pushing a cart containing sports equipment along one side of their local sports field.
In section A, the cart is speeding up.
In section B, the cart is rolling at a constant speed.
In section C, the cart is speeding up again.
In section D, the cart is rolling at a new constant speed.
Then they think about how this data relates to what they learned in class about kinetic energy.
Study the graph and then answer the questions.
n which section or sections is the cart's kinetic energy increasing?
You might need to choose more than one answer.
(1 point)
Responses
section A
section A
section B
section B
section C
section C
section D
section D
section E
section E
Question 2
b. How would you describe the cart's kinetic energy in section B?(1 point)
Responses
The cart has a constant kinetic energy.
The cart has a constant kinetic energy.
The cart has an increasing kinetic energy.
The cart has an increasing kinetic energy.
The cart has a decreasing kinetic energy.
The cart has a decreasing kinetic energy.
The cart has no kinetic energy.
The cart has no kinetic energy.
Question 3
c. Describe the cart's motion in section E.(1 point)
Responses
The cart is getting slower.
The cart is getting slower.
The cart is getting faster.
The cart is getting faster.
The cart is moving at a constant speed.
The cart is moving at a constant speed.
The cart is not moving.
The cart is not moving.
Question 4
d. What is happening to the cart's kinetic energy is section E?(1 point)
Responses
The kinetic energy is increasing.
The kinetic energy is increasing.
The kinetic energy is decreasing.
The kinetic energy is decreasing.
The kinetic energy is staying the same.
The kinetic energy is staying the same.
The kinetic energy goes down and then up.
The kinetic energy goes down and then up.
Question 5
e. In sections A, B, C, and D, what causes the cart to move?(1 point)
Responses
The ground transfers energy to the cart.
The ground transfers energy to the cart.
Joaquin and Susanna transfer energy to the cart.
Joaquin and Susanna transfer energy to the cart.
Joaquin and Susanna stop pushing the cart.
Joaquin and Susanna stop pushing the cart.
Gravity makes the cart move.
Gravity makes the cart move.
Question 6
f. What is the most likely explanation for the motion of the cart in section E?(1 point)
Responses
The sports equipment fell out of the cart.
The sports equipment fell out of the cart.
Someone else helped Joaquin and Susanna push faster.
Someone else helped Joaquin and Susanna push faster.
The cart started going downhill.
The cart started going downhill.
Joaquin and Susanna stopped pushing the cart and let it roll to a stop.
Joaquin and Susanna stopped pushing the cart and let it roll to a stop.
a. The cart's kinetic energy is increasing in section A and section C.
b. The cart has a constant kinetic energy in section B.
c. The cart is moving at a constant speed in section E.
d. The kinetic energy is staying the same in section E.
e. Joaquin and Susanna transfer energy to the cart in sections A, B, C, and D.
f. Joaquin and Susanna stopped pushing the cart and let it roll to a stop in section E.
Mrs. Smith is teaching a science class. She holds a pendulum and pulls the ball at the end of the pendulum to position A. Then she lets it swing to position G.
The picture below shows the starting position A, the ending position G, and several positions in between the start and the end. The arrow shows the direction of motion.
a. At position A, describe the energy of the pendulum ball.(1 point)
Responses
Kinetic energy and potential energy are both at their lowest values.
Kinetic energy and potential energy are both at their lowest values.
Potential energy and kinetic energy are both at their highest values.
Potential energy and kinetic energy are both at their highest values.
Potential energy is at its highest value, while kinetic energy is at its lowest value.
Potential energy is at its highest value, while kinetic energy is at its lowest value.
Kinetic energy is at its highest value, while potential energy is at its lowest value.
. Drag the terms (listed below the paragraph) into the blanks in order to correctly complete the paragraph.
You will use the terms more than one time each.
(2 points)
Put responses in the correct input to answer the question. Select a response, navigate to the desired input and insert the response. Responses can be selected and inserted using the space bar, enter key, left mouse button or touchpad. Responses can also be moved by dragging with a mouse.
At positions B and C, Response areais decreasing and Response area is increasing.
At positions E and F, Response areais decreasing and Response area is increasing.
At position D, describe the energy of the pendulum ball.
(1 point)
Responses
Potential energy and kinetic energy are both at their highest values.
Potential energy and kinetic energy are both at their highest values.
Potential energy is at its highest value, while kinetic energy is at its lowest value.
Potential energy is at its highest value, while kinetic energy is at its lowest value.
Kinetic energy and potential energy are both at their lowest values.
Kinetic energy and potential energy are both at their lowest values.
Kinetic energy is at its highest value, while potential energy is at its lowest value
Describe the speed of the pendulum ball at position D.
(1 point)
Responses
The speed is at its highest value.
The speed is at its highest value.
The speed is at its lowest value.
The speed is at its lowest value.
The speed is zero.Use the drop down responses to complete the paragraph.
(5 points)
Energy
be created or destroyed by ordinary physical or chemical process.
This concept is called the
Throughout the experiment, the total amount of energy must
.
When potential energy goes down, kinetic energy
.
When potential energy goes up, kinetic energy
.
a. At position A, potential energy is at its highest value, while kinetic energy is at its lowest value.
b. At positions B and C, potential energy is decreasing and kinetic energy is increasing.
c. At positions E and F, potential energy is decreasing and kinetic energy is increasing.
d. At position D, potential energy and kinetic energy are both at their lowest values.
e. The speed of the pendulum ball at position D is at its highest value.
Energy cannot be created or destroyed by ordinary physical or chemical processes. This concept is called the law of conservation of energy.
Throughout the experiment, the total amount of energy must remain constant.
When potential energy goes down, kinetic energy increases.
When potential energy goes up, kinetic energy decreases.
Drag the terms (listed below the paragraph) into the blanks in order to correctly complete the paragraph.
You will use the terms more than one time each.
(2 points)
Put responses in the correct input to answer the question. Select a response, navigate to the desired input and insert the response. Responses can be selected and inserted using the space bar, enter key, left mouse button or touchpad. Responses can also be moved by dragging with a mouse.
At positions B and C, is decreasing and is increasing.
At positions E and F, is decreasing and is increasing.
At positions B and C, potential energy is decreasing and kinetic energy is increasing.
At positions E and F, potential energy is decreasing and kinetic energy is increasing.
At position D, describe the energy of the pendulum ball.
(1 point)
Responses
Potential energy and kinetic energy are both at their highest values.
Potential energy and kinetic energy are both at their highest values.
Potential energy is at its highest value, while kinetic energy is at its lowest value.
Potential energy is at its highest value, while kinetic energy is at its lowest value.
Kinetic energy and potential energy are both at their lowest values.
Kinetic energy and potential energy are both at their lowest values.
Kinetic energy is at its highest value, while potential energy is at its lowest value.
Kinetic energy is at its highest value, while potential energy is at its lowest value.
Question 4
At position D, potential energy and kinetic energy are both at their lowest values.
Describe the speed of the pendulum ball at position D.
(1 point)
Responses
The speed is at its highest value.
The speed is at its highest value.
The speed is at its lowest value.
The speed is at its lowest value.
The speed is zero.
The speed of the pendulum ball at position D is at its lowest value.
are you sure
Apologies for the confusion. The speed of the pendulum ball at position D would depend on the specific conditions and setup of the pendulum. Without further information, it is not possible to determine the exact speed at that position.
Use the drop down responses to complete the paragraph.
(5 points)
Energy
be created or destroyed by ordinary physical or chemical process.
This concept is called the
Throughout the experiment, the total amount of energy must
.
When potential energy goes down, kinetic energy
.
When potential energy goes up, kinetic energy
.
Energy cannot be created or destroyed by ordinary physical or chemical processes.
This concept is called the law of conservation of energy.
Throughout the experiment, the total amount of energy must remain constant.
When potential energy goes down, kinetic energy increases.
When potential energy goes up, kinetic energy decreases.