To solve this worksheet, we need to determine whether each described object has
potential energy or
kinetic energy. Here's a brief explanation of the two forms of energy:
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Potential Energy: This is stored energy due to an object's position or state. Examples include objects at a height (gravitational potential energy) or objects under tension (elastic potential energy).
-
Kinetic Energy: This is the energy of motion. Any object in motion possesses kinetic energy.
Now, let's analyze each scenario and fill in the blanks:
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1. An apple falling from a tree
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Analysis: The apple is in motion as it falls. Therefore, it has kinetic energy.
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Answer: Kinetic Energy
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2. A stationary ball on the ground
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Analysis: The ball is not moving, so it does not have kinetic energy. However, since it is on the ground, it does not have gravitational potential energy either (relative to the ground). If there are no other factors (e.g., stretched spring), it has no energy in this context.
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Answer: No energy (or Potential Energy if considering other contexts like elastic potential)
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3. A sleeping dog
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Analysis: The dog is not moving, so it does not have kinetic energy. There is no indication of any stored energy (e.g., height or tension), so it likely has no energy in this context.
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Answer: No energy (or Potential Energy if considering other contexts like chemical energy)
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4. A boy running across the street
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Analysis: The boy is in motion, so he has kinetic energy.
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Answer: Kinetic Energy
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5. A car traveling on the road
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Analysis: The car is in motion, so it has kinetic energy.
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Answer: Kinetic Energy
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6. A stretched rubber band
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Analysis: The rubber band is under tension, which means it has stored energy (elastic potential energy).
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Answer: Potential Energy
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7. A basketball being thrown
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Analysis: The basketball is in motion as it is being thrown, so it has kinetic energy.
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Answer: Kinetic Energy
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8. A girl biking at the park
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Analysis: The girl is in motion while biking, so she has kinetic energy.
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Answer: Kinetic Energy
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9. A leaf lying on the ground
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Analysis: The leaf is not moving, so it does not have kinetic energy. Since it is on the ground, it does not have gravitational potential energy either (relative to the ground). If there are no other factors, it has no energy in this context.
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Answer: No energy (or Potential Energy if considering other contexts like chemical energy)
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10. A planet revolving around a star
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Analysis: The planet is in motion as it revolves around the star, so it has kinetic energy. Additionally, due to its position relative to the star, it also has gravitational potential energy.
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Answer: Both Potential Energy and Kinetic Energy
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Final Answers:
1. Kinetic Energy
2. No energy (or Potential Energy)
3. No energy (or Potential Energy)
4. Kinetic Energy
5. Kinetic Energy
6. Potential Energy
7. Kinetic Energy
8. Kinetic Energy
9. No energy (or Potential Energy)
10. Both Potential Energy and Kinetic Energy
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Boxed Final Answer:
\[
\boxed{
\begin{array}{ll}
1. & \text{Kinetic Energy} \\
2. & \text{No energy (or Potential Energy)} \\
3. & \text{No energy (or Potential Energy)} \\
4. & \text{Kinetic Energy} \\
5. & \text{Kinetic Energy} \\
6. & \text{Potential Energy} \\
7. & \text{Kinetic Energy} \\
8. & \text{Kinetic Energy} \\
9. & \text{No energy (or Potential Energy)} \\
10. & \text{Both Potential Energy and Kinetic Energy} \\
\end{array}
}
\]
Parent Tip: Review the logic above to help your child master the concept of potential energy and kinetic energy worksheet.
