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Ninth Grade (Grade 9) Physics Questions

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Grade 9 Heat Transfer
Friction causes kinetic energy to be converted into                  .
  1. potential energy
  2. thermal energy
  3. mechanical energy
  4. electrical energy
Grade 9 Simple Machines
Grade 9 Energy and Momentum
Grade 9 Forces and Motion
The weight of an object                                                   .
  1. stays the same wherever the object is.
  2. changes if the object is in motion.
  3. stays the same as long as the object is in motion.
  4. changes if the force of gravity changes.
Grade 9 Magnetism and Electricity
Grade 9 Forces and Motion
Seat belt laws are a good idea because of which of the following law of motion?
  1. Newton's second law of motion
  2. Newton's first law of motion
  3. Newton's third law of motion
  4. Murphy's law of motion
  5. None of the above
Grade 9 Energy and Momentum
Mechanical energy is                                                         .
  1. found in machinery only
  2. usually measured at the atomic level
  3. the sum of the chemical and thermal energy of an object
  4. the sum of the kinetic and potential energy of an object
Grade 9 Waves and Sound
Grade 9 Energy and Momentum
Which form of energy does a plant store when light is transformed during photosynthesis?
  1. chemical energy
  2. thermal energy
  3. mechanical energy
  4. electrical energy
Grade 9 Magnetism and Electricity
Telephones use electromagnets to change                                 .
  1. electric currents to light waves
  2. electric currents to sound waves
  3. magnetism to light waves
  4. magnetism to sound waves
Grade 9 Matter
Grade 9 Energy and Momentum
Potential energy + kinetic energy is equal to                               .
  1. gravitational potential energy
  2. thermal energy
  3. chemical energy
  4. mechanical energy
Grade 9 Simple Machines
The force you apply to a machine is the                .
  1. efficiency
  2. input force
  3. output force
  4. resistance
Grade 9 Forces and Motion
Grade 9 Forces and Motion
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