Exploring Mechanical Energy Transformations

What is the formula for calculating kinetic energy?

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DOK Level 1: Recall

Which of the following is an example of gravitational potential energy?

• A compressed spring

• A book on a shelf

• A moving car

• A stretched rubber band

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DOK Level 1: Recall

What is the unit of work in the International System of Units (SI)?

• Newton

• Joule

• Watt

• Pascal

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DOK Level 1: Recall

• 49 J

• 98 J

• 490 J

• 980 J

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DOK Level 2: Skill/Concept

A 2 kg object is moving with a velocity of 3 m/s. Calculate its kinetic energy.

• 3 J

• 6 J

• 9 J

• 18 J

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DOK Level 2: Skill/Concept

Explain how energy is conserved in a system where a ball is thrown upwards and then falls back down.

• The ball gains kinetic energy as it rises and loses potential energy.

• The ball loses kinetic energy and gains potential energy as it rises, and the reverse happens as it falls.

• The ball only has kinetic energy throughout its motion.

• The ball only has potential energy throughout its motion.

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DOK Level 3: Strategic Thinking

• 49 J

• 98 J

• 490 J

• 980 J

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DOK Level 2: Skill/Concept

Describe a real-life scenario where elastic potential energy is transformed into kinetic energy.

• A car accelerating on a highway.

• A person jumping off a diving board.

• A compressed spring releasing and pushing a toy car.

• A book falling off a shelf.

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DOK Level 3: Strategic Thinking

Which of the following statements is true about work done by a force?

• Work is done only when the force is perpendicular to the direction of motion.

• Work is done only when the force is parallel to the direction of motion.

• Work is done when there is a component of force in the direction of motion.

• Work is done only when the object is stationary.

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DOK Level 2: Skill/Concept

Identify the type of energy transformation that occurs when a bow is drawn and then released to shoot an arrow.

• Chemical energy to kinetic energy

• Elastic potential energy to kinetic energy

• Gravitational potential energy to kinetic energy

• Thermal energy to kinetic energy

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DOK Level 2: Skill/Concept