The girl in the picture is at the highest point in swinging and starts to come down. Which statement could describe the changes
in energy for her? (1 point)
A) Potential energy is increasing, and kinetic energy is decreasing.
B) Kinetic energy is increasing, and potential energy is decreasing.
C) Kinetic and potential energy are increasing.
D) Kinetic and potential energy are decreasing.
2. Earth is closest to the sun around January 3 each year, and it is farthest from the sun near July 4. Around which date would Earth be moving the slowest as it orbits the sun? (1 point)
A) October 3
B) April 4
C) July 4
D) January 3
3.At which of the three points, if any, is the bicyclist’s potential energy increasing?
(1 point)
A)The potential energy is increasing at point C because the bicyclist is increasing in elevation at that point.
B)The potential energy is increasing at point A because the bicyclist is moving fastest at that point.
C)The potential energy is always decreasing because the bicyclist continues to move forward.
D)The potential energy is increasing at point B because the bicyclist is highest there
4.How would potential energy and kinetic energy change going down stairs one at a time or two at a time?(1 point)
A) Going down stairs two at a time means you will get down in fewer steps, which saves you some kinetic and potential energy.
B) If you go down stairs two at a time, then you are going a greater distance, which will decrease your potential energy. Your kinetic energy will be less when you land on the stair.
C) Going down stairs two at a time will give you twice as much kinetic energy by the time you reach the bottom stair.
D)If you go down stairs two at a time, then your potential energy relative to the stair is greater. Your kinetic energy will be greater when you land.
1) Kinetic energy is increasing, and potential energy is decreasing.
2) July 4th
3) The potential energy is increasing at point C because the bicyclist is increasing in elevation at that point.
4) If you go down stairs two at a time, then your potential energy relative tot he stair is greater. Your kinetic energy will be greater when you land.
