The pendulum in the diagram below swings from position A to B.
If we don’t consider friction, what happens to the total mechanical energy as the pendulum swings from position A to position B?
(1 point)
Responses
It remains the same
It remains the same
It is not conserved
It is not conserved
It becomes greater.
It becomes greater.
It declines
It remains the same.
. Rebecca climbs the ladder of a large water slide, waits her turn at the top, and then slides down the slide into a pool. Which answer best describes the energy changes during her time on the slide?(1 point)
Responses
kinetic → potential → kinetic
kinetic → potential → kinetic
potential → mechanical → kinetic
potential → mechanical → kinetic
kinetic → mechanical → potential
kinetic → mechanical → potential
potential → kinetic → potential
kinetic → potential → kinetic
The correct answer is "It remains the same."
To determine what happens to the total mechanical energy as the pendulum swings from position A to position B, we need to understand the concept of mechanical energy. Mechanical energy is the sum of kinetic energy and potential energy of an object.
In the given scenario, as the pendulum swings from position A to position B, it undergoes a change in height. As the height changes, the potential energy of the pendulum also changes.
Since we are not considering friction, there is no energy loss due to non-conservative forces. Therefore, the total mechanical energy of the pendulum will remain the same. This means that the sum of its kinetic energy and potential energy will be constant throughout the swing, regardless of the change in height.
Based on this analysis, the correct option is:
- It remains the same