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
kinetic energy
kinetic energy
potential energy
potential energy
electrical energy
electrical energy
The ball held at the top of the table has potential energy.
As the ball is falling, what is happening to its energy?(1 point)
Responses
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
potential energy stays the same as it falls
As the ball is falling, its potential energy converts to kinetic energy.
Just before the ball hits the ground, how are its speed and kinetic energy related?(1 point)
Responses
Both speed and kinetic energy are at their lowest values.
Both speed and kinetic energy are at their lowest values.
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.
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 greatest values.
Just before the ball hits the ground, both speed and kinetic energy are at their highest 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.
a. How would the splashes of the two balls compare?
(1 point)
Responses
The ball with the higher mass would make a bigger splash.
The ball with the higher mass would make a bigger splash.
The ball with the lower mass would make a bigger splash.
The ball with the lower mass would make a bigger splash.
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 balls would make splashes of the same size.
The ball with the higher mass would make a bigger splash.
How does the mass of a falling object impact the object's kinetic energy?(1 point)
Responses
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.
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 a decrease in kinetic energy.
An increase in mass causes an increase in kinetic energy.
What happens to the kinetic energy of a ball when it hits the water?(1 point)
Responses
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.
Overall, kinetic energy is lost.
Some of the energy is transferred to the water.
Some of the energy is transferred to the water.
Overall, kinetic energy is gained.