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.
Think about the motion of the pendulum as you answer the questions.
Question 1
a. At position A, 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.
Kinetic energy and potential energy are both at their lowest values.
Kinetic energy and potential energy are both at their lowest 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.
Potential energy is at its highest value, while kinetic energy is at its lowest value.
b. 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.
you Shure
Yes, I am sure. At positions B and C, as the pendulum ball moves closer to the lowest point (position G), its potential energy decreases and its kinetic energy increases. At positions E and F, as the pendulum ball moves away from the lowest point, its potential energy also decreases and its kinetic energy increases.
c. 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.
At position D, potential energy is at its highest value, while kinetic energy is at its lowest value.
d. 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 is at its lowest value.
e. 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