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
electrical energy
electrical energy
kinetic energy
kinetic energy
potential energy
potential energy
motion energy
motion energy
Question 2
b. As the ball is falling, what is happening to its energy?(1 point)
Responses
potential energy stays the same as it falls
potential energy stays the same as it falls
kinetic energy converts to potential energy as it falls
kinetic energy converts to potential energy as it falls
potential energy converts to kinetic energy as it falls
potential energy converts to kinetic energy as it falls
kinetic energy stays the same as it falls
kinetic energy stays the same as it falls
Question 3
c. Just before the ball hits the ground, how are its speed and kinetic energy related?(1 point)
Responses
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.
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.
Both speed and kinetic energy are at their lowest values.
49 answers
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
electrical energy
electrical energy
kinetic energy
kinetic energy
potential energy
potential energy
motion energy
Responses
potential energy stays the same as it falls
potential energy stays the same as it falls
kinetic energy converts to potential energy as it falls
kinetic energy converts to potential energy as it falls
potential energy converts to kinetic energy as it falls
potential energy converts to kinetic energy as it falls
kinetic energy stays the same as it falls
a. How would the splashes of the two balls compare?
(1 point)
Responses
The size of the splash is independent of the mass of the ball.
The size of the splash is independent of the mass of the ball.
The ball with the lower mass would make a bigger splash.
The ball with the lower mass would make a bigger splash.
The ball with the higher mass would make a bigger splash.
The ball with the higher mass would make a bigger splash.
The balls would make splashes of the same size.
Responses
A decrease in mass causes an increase in kinetic energy.
A decrease in mass causes an increase in kinetic energy.
An increase in mass causes an increase in kinetic energy.
An increase in mass causes an increase in kinetic energy.
Mass does not impact kinetic energy.
Mass does not impact kinetic energy.
An increase in mass causes a decrease in kinetic energy.
Responses
Some of the energy is transferred to the water.
Some of the energy is transferred to the water.
Overall, kinetic energy is gained.
Overall, kinetic energy is gained.
All of the kinetic energy is kept by the ball.
All of the kinetic energy is kept by the ball.
Overall, kinetic energy is lost.
The 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
Responses
10 m
10 m
just below 10 m
just below 10 m
just above 0 m
just above 0 m
0 m
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.
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.
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. 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
.
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.
a. Some objects have energy due to their positions above the ground. This is called gravitational 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. 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.
- potential energy – One basketball is stored on a shelf about 4 feet high.
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.
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'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 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 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.
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 pushes the grocery cart to make it start moving.
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 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.
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.