Science Quick Check Part 1. 1 Correct Answer Per Question.

Question

1. Use the picture to answer the question.

A girl is on a swing swinging high into the sky

The girl in the picture is at the highest point in swinging and starts to come down. Which statement best describes the changes in energy as she begins to descend?
a. Kinetic and potential energy are increasing.
b. Kinetic and potential energy are decreasing.
c. Kinetic energy is increasing, and potential energy is decreasing.
d. Potential energy is increasing, and kinetic energy is decreasing.

2. A person is riding a skateboard on a U-shaped ramp. At which point does the person have the greatest potential energy?
a. in the middle of the ramp at its lowest point in the U
b. at the top of the ramp before they begin moving down into the ramp
c. on the first part of the ramp as the person is moving down the side
d. on the other side of the ramp as the person is coming back up

3. Use the picture to answer the question.

An illustration depicts a cyclist riding a bike along a hill. The end on the right where the cyclist moves upward is labeled C, the top of the hill is labeled B, and the end on the left where the cyclist moves downward is labeled A.

As the bicyclist rides from right to left, at which of the three points, if any, is the bicyclist’s potential energy increasing?
a. The potential energy is increasing at point B because the bicyclist is highest there.
b. The potential energy is increasing at point A because the bicyclist is moving fastest at that point.
c. The potential energy is increasing at point C because the bicyclist is increasing in elevation at that point.
d. The potential energy is always decreasing because the bicyclist continues to move forward.

4. If a monkey drops a banana off of a cliff, where are the potential and kinetic energies of the banana equal?
a. halfway down
b. a quarter of the way down
c. at the top
d. at the bottom

Answer 1

Here are the correct answers to your Science Quick Check Part 1:

1. c. Kinetic energy is increasing, and potential energy is decreasing.
   As the girl swings down from the highest point, her potential energy decreases while her kinetic energy increases.

2. b. at the top of the ramp before they begin moving down into the ramp.
   The potential energy is greatest at the highest point of the ramp.

3. c. The potential energy is increasing at point C because the bicyclist is increasing in elevation at that point.
   As the bicyclist moves upward at point C, their potential energy increases.

4. a. halfway down.
   At the halfway point down the cliff, the potential energy and kinetic energy are equal due to the conservation of energy, assuming no energy is lost to air resistance or other forces.