Problem Analysis:
The task involves identifying whether the given scenarios represent
Potential Energy or
Kinetic Energy. Here are the definitions to guide our reasoning:
-
Potential Energy: Stored energy that is not currently doing work but has the potential to do work. Examples include an object at a height (gravitational potential energy) or a stretched spring (elastic potential energy).
-
Kinetic Energy: Energy of motion. An object in motion possesses kinetic energy.
Solution:
Let's analyze each scenario step by step:
1.
The apple in the table is ______ energy.
- The apple is stationary and positioned at a height above the ground. This means it has the potential to fall due to gravity.
-
Answer: Potential Energy
2.
The apple falling from the table is ______ energy.
- The apple is in motion as it falls. Motion implies kinetic energy.
-
Answer: Kinetic Energy
3.
If the rock falls from the hill, it is ______ energy.
- The rock is in motion as it falls down the hill. Motion indicates kinetic energy.
-
Answer: Kinetic Energy
4.
If the rock is still, it is ______ energy.
- The rock is stationary and not moving. However, if it is elevated (e.g., on top of the hill), it has the potential to fall.
-
Answer: Potential Energy
5.
If the cyclist is still, he has ______ energy.
- The cyclist is stationary and not moving. Therefore, there is no kinetic energy.
-
Answer: Potential Energy
6.
If he is moving, he has ______ energy.
- The cyclist is in motion. Motion implies kinetic energy.
-
Answer: Kinetic Energy
7.
If the yo-yo is still at the top, it is ______ energy.
- The yo-yo is stationary and positioned at a height. This means it has the potential to fall due to gravity.
-
Answer: Potential Energy
8.
If the yo-yo is moving, it is ______ energy.
- The yo-yo is in motion. Motion indicates kinetic energy.
-
Answer: Kinetic Energy
9.
If the boy throws the ball, it is ______ energy.
- The ball is in motion after being thrown. Motion implies kinetic energy.
-
Answer: Kinetic Energy
10.
The ball on the boy’s hand is ______ energy.
- The ball is stationary while held in the boy’s hand. There is no motion, so it does not have kinetic energy.
-
Answer: Potential Energy
Final Answers:
1. Potential Energy
2. Kinetic Energy
3. Kinetic Energy
4. Potential Energy
5. Potential Energy
6. Kinetic Energy
7. Potential Energy
8. Kinetic Energy
9. Kinetic Energy
10. Potential Energy
Boxed Final Answer:
\[
\boxed{
\text{1. Potential Energy, 2. Kinetic Energy, 3. Kinetic Energy, 4. Potential Energy, 5. Potential Energy, 6. Kinetic Energy, 7. Potential Energy, 8. Kinetic Energy, 9. Kinetic Energy, 10. Potential Energy}
}
\]
Parent Tip: Review the logic above to help your child master the concept of eighth grade science worksheet.
