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Ninth Grade (Grade 9) Physics Questions

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Grade 9 Simple Machines
If a machine has a mechanical advantage less than one, which of the following must be true?
  1. The effort force is less than the resistance force.
  2. The effort distance is greater than the resistance distance.
  3. The effort distance is less than the resistance distance.
  4. The effort force and resistance force are the same.
Grade 9 Forces and Motion
Newton's First Law is also known as
  1. The Law of Velocity.
  2. The Law of Gravity.
  3. The Law of Inertia.
  4. The Law of Conservation.
  5. The Law of the Land.
Grade 9 Light and Optics
The reflection of light off a shiny, smooth surface is                     .
  1. diffuse reflection
  2. regular reflection
  3. irregular reflection
  4. none of the above
Grade 9 Forces and Motion
An astronaut drops a hammer and an egg while standing on the surface of the Moon. Which one will hit the surface first?
  1. the egg
  2. the hammer
  3. both will land at the same time
  4. neither, both will float off into space
Grade 9 Forces and Motion
What is Newton's third law of motion?
  1. If an object applies a force on another object, the latter will stop moving.
  2. If an object exerts a force on another object, then the latter must exert a force of equal magnitude and opposite direction back on the first object
  3. If an object exerts a force on another object, the object's velocity will cut into half.
  4. If an object exerts a force on another object, nothing happens.
Grade 9 Forces and Motion
Two different forces acting on a falling leaf are                                  .
  1. gravity and air resistance
  2. air resistance and fluid friction
  3. gravity and static friction
  4. weight and rolling friction
Grade 9 Forces and Motion
Which two factors affect gravitational force? Choose TWO answers.
  1. mass
  2. velocity
  3. momentum
  4. distance
  5. inertia
Grade 9 Magnetism and Electricity
The total amount of energy delivered every second to a resistor is a measure of
  1. Volts.
  2. Power.
  3. Current.
  4. Resistance.
Grade 9 Forces and Motion
Not all moving parts are subject to friction.
  1. True
  2. False
Grade 9 Forces and Motion
What is Newton's second law of motion?
  1. An object's mass depends directly on the acceleration of the object.
  2. An object's acceleration is indirectly related to an object's mass.
  3. The acceleration of an object is directly related to the net force and inversely related to its mass.
  4. The acceleration of an object is not related to the net force and is directly proportional to its mass.
Grade 9 Energy and Momentum

This question is a part of a group with common instructions. View group »

As the rubber band is released and moves forward, which of the following is true?
  1. The total energy of the system is increasing.
  2. Potential energy is being converted to kinetic energy.
  3. Kinetic energy is being converted to potential energy.
  4. All of the energy is disappearing from the system.
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