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Grade 9 Kinetic & Potential Energy Worksheet with Answers

Grade 9 (US) · Year 10 (UK) · Class 9 (India) · Physics

Unit 3: Energy & WorkKinetic & Potential EnergyNGSS HS-PS3-1

Calculating kinetic energy (½mv²) and gravitational potential energy (mgh). This free high school worksheet has 12 questions and a full answer key. Print it or save it as a PDF — every answer is checked by code, not guessed.

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Kinetic & Potential Energy

Grade 9 · Physics

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Learning goal: Kinetic & Potential Energy · NGSS HS-PS3-1

Directions: Read each question carefully. Circle the correct choice or write your answer on the line. Use the diagram to help you.

Example

A 16 kg object moves at 3 m/s. What is its kinetic energy? (KE = ½mv²)

Answer: 72 J

RememberPotential and kinetic energy

top: most potentialbottom: most kineticPE = m × g × h (height)KE = ½ × m × v² (speed)Energy changes form butthe total stays the same.
  1. 1

    A roller coaster is at the very top of a hill. Is its potential energy at a maximum or minimum?

    MaximumMinimum
  2. 2

    A 3 kg object moves at 10 m/s. What is its kinetic energy? (KE = ½mv²)

    3 kgv = 10 m/sKE = ½ m v² = ?
  3. 3

    If an object's speed doubles, what happens to its kinetic energy?

  4. 4

    A 9 kg object moves at 3 m/s. What is its kinetic energy? (KE = ½mv²)

    9 kgv = 3 m/sKE = ½ m v² = ?
  5. 5

    An 8 kg object moves at 7 m/s. What is its kinetic energy? (KE = ½mv²)

    8 kgv = 7 m/sKE = ½ m v² = ?
  6. 6

    A 15 kg object is 12 m above the ground. What is its potential energy? (PE = mgh, g = 10 m/s²)

    15kgh = 12 mPE = m g hg = 10 m/s²
  7. 7

    A 19 kg object is 1 m above the ground. What is its potential energy? (PE = mgh, g = 10 m/s²)

    19kgh = 1 mPE = m g hg = 10 m/s²
  8. 8

    An 18 kg object is 2 m above the ground. What is its potential energy? (PE = mgh, g = 10 m/s²)

    18kgh = 2 mPE = m g hg = 10 m/s²
  9. 9

    An 11 kg object is 7 m above the ground. What is its potential energy? (PE = mgh, g = 10 m/s²)

    11kgh = 7 mPE = m g hg = 10 m/s²
  10. 10

    A 3 kg object moves at 11 m/s. What is its kinetic energy? (KE = ½mv²)

    3 kgv = 11 m/sKE = ½ m v² = ?
  11. 11

    A 9 kg object moves at 11 m/s. What is its kinetic energy? (KE = ½mv²)

    9 kgv = 11 m/sKE = ½ m v² = ?
  12. 12

    A 4 kg object moves at 9 m/s. What is its kinetic energy? (KE = ½mv²)

    4 kgv = 9 m/sKE = ½ m v² = ?

★ Challenge corner for fast finishers

Ice floats in water. What does that tell you about its density?

How did I do?

Teacher's comments

Free printable worksheets with answer keys · aethelsystems.com/worksheets/physics/9/kinetic_potential

Answer key (click to show)
  1. 1.maximum
  2. 2.150 J
  3. 3.it becomes 4 times as large
  4. 4.40.5 J
  5. 5.196 J
  6. 6.1800 J
  7. 7.190 J
  8. 8.360 J
  9. 9.770 J
  10. 10.181.5 J
  11. 11.544.5 J
  12. 12.162 J
  13. ★ice is less dense than liquid water (challenge corner)

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