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.
Skip to navigation