Directions: The picture below shows the path of a ball thrown into the air. It leaves the hand at point R, hits the peak of the throw at point S, and falls toward the ground at point T. Use the picture to answer any questions that follow.

Question

Multiple Choice Question
At which point(s) does the ball have maximum potential energy and minimum kinetic energy?
A.
points R and T

B.
points S and T

C.
point S, only

D.
point T, only

Answer 1

The ball has maximum potential energy and minimum kinetic energy at the highest point of its trajectory, which is point S. At this point, the ball is momentarily at rest before it starts to fall back down, meaning it has the least kinetic energy.

Therefore, the correct answer is:

C. point S, only

Answer 2

Multiple Choice Question
A glow stick is a plastic tube that contains two separate liquids. When the liquids are mixed, they glow. The diagrams show the process that causes a glow stick to emit light.

Based on the diagrams, what energy transformations occur when using a glow stick?
A.
Chemical energy cracks the inner tube, which starts a reaction that transforms thermal energy into light energy.

B.
Thermal energy cracks the inner tube, which starts a reaction that transforms potential energy into light energy.

C.
Mechanical energy cracks the inner tube, which starts a reaction that transforms chemical energy into light energy.

D.
Potential energy cracks the inner tube, which starts a reaction that transforms mechanical energy into light energy.

Answer 3

In a glow stick, the process begins when the inner tube is cracked, allowing two separate liquids to mix. This mixing causes a chemical reaction that results in the emission of light. The energy transformation that primarily occurs involves chemical energy being converted into light energy.

The most accurate answer, considering these transformations, is:

C. Mechanical energy cracks the inner tube, which starts a reaction that transforms chemical energy into light energy.

Answer 4

Multiple Choice Question
Which of the following types of energy transfers can take place when matter is not present?
A.
heat

B.
conduction

C.
radiation

D.
convection

Answer 5

The type of energy transfer that can take place when matter is not present is:

C. radiation

Radiation involves the transfer of energy through electromagnetic waves, which can occur in a vacuum (such as the transfer of energy from the Sun to the Earth). In contrast, conduction and convection require a medium (matter) to transfer heat.

Answer 6

Multiple Choice Question
The graph shows a bicycle rider's motion during the first portion of a race.

What conclusion can be drawn about the rider's motion?
A.
The rider maintained a constant speed during the time period between 0 and 10 seconds.

B.
The rider did not move during the time period between 10 and 15 seconds.

C.
The rider rode downhill during the time period between 15 and 20 seconds.

D.
The rider slowed down during the time period between 15 and 20 seconds.

Answer 7

To accurately answer the question about the bicycle rider's motion, I would normally need to see the specific graph you mentioned. However, I can provide general guidance based on the information typically represented in such graphs.

1. Constant Speed: If the graph shows a straight line (linear) with a positive slope between 0 and 10 seconds, this indicates constant speed.

2. No Movement: If the graph is flat (horizontal) between 10 and 15 seconds, the rider did not move.

3. Downhill Motion: If the graph shows a negative slope during the time period between 15 and 20 seconds, this indicates that the rider is going downhill.

4. Slowed Down: If the slope of the graph decreases (becomes less steep) during the time period between 15 and 20 seconds, this would show that the rider is slowing down.

Based on typical interpretations:

• If the graph has a straight line between 0 and 10 seconds, A would be correct.
• If the line is flat between 10 and 15 seconds, B would be correct.
• If there's a downward slope between 15 and 20 seconds, C would be correct.
• If the slope decreases during that time, D would be correct.

Without the visual, I can't definitively conclude, but you can use these interpretations to choose the most accurate answer based on the graph in question.

Answer 8

the line starts at 0, 0 and there's a point at (10, 9) and goes straight to (15, 9) and goes down to (20, 7)

Answer 9

Thank you for providing the details of the graph. Based on your description, we can analyze the rider's motion as follows:

• From \((0, 0)\) to \((10, 9)\): The line is rising, indicating that the rider is gaining speed, moving with constant acceleration.
• From \((10, 9)\) to \((15, 9)\): The line is horizontal, which means the rider maintained a constant speed during this period, specifically at a speed that corresponds to the y-value (9).
• From \((15, 9)\) to \((20, 7)\): The line is sloping downward, indicating that the rider is slowing down from their constant speed, as the speed decreases from 9 to 7.

Given this information, the most accurate conclusion you can draw about the rider's motion is:

A. The rider maintained a constant speed during the time period between 10 and 15 seconds.

This is the best choice based on the described graph.

Answer 10

Directions: Use the graph below depicting the motion of a cyclist to answer any questions that follow.

Multiple Choice Question
Which of the following best describes the acceleration of the cyclist?
A.
decreasing

B.
zero and constant

C.
constant but non-zero

D.
increasing

Answer 11

Based on the motion of the cyclist as described in your previous input, we can determine the acceleration of the cyclist by analyzing the segments of the graph:

1. From \((0, 0)\) to \((10, 9)\): The line has a positive slope, indicating that the cyclist is accelerating.

2. From \((10, 9)\) to \((15, 9)\): The line is horizontal, indicating that the cyclist is moving at a constant speed. During this time, the acceleration is zero.

3. From \((15, 9)\) to \((20, 7)\): The line has a negative slope, meaning the cyclist is decelerating (slowing down). The acceleration is negative.

Given these observations:

• The cyclist experiences positive acceleration, followed by zero acceleration, and then negative acceleration.

Considering the options provided:

A. decreasing: This could refer to the moment of deceleration but does not describe the entire graph.

B. zero and constant: This is only true during the time period between 10 and 15 seconds and does not describe the complete motion.

C. constant but non-zero: This does not apply because the acceleration changes throughout the journey.

D. increasing: This could refer to the initial acceleration but does not encompass the full description accurately.

Since acceleration is zero during the 10 to 15 seconds and then becomes negative, the best answer is:

B. zero and constant

But note that it only applies specifically to the segment between 10 and 15 seconds. If you are looking for a broader description that accounts for all segments, it would indicate that there are varying accelerations.

If there is a need to select one that summarizes the overall behavior instead, considering that the cyclist changes speed significantly, the options presented may not fully capture the behavior accurately.