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Ninth Grade (Grade 9) Forces and Motion Questions

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Grade 9 Forces and Motion
Horizontal lines on a velocity/time graph show
  1. constant acceleration.
  2. no motion.
  3. positive acceleration.
  4. negative acceleration.
Grade 9 Forces and Motion
If the net force on an object is zero, the the object has?
  1. reaction forces
  2. action forces
  3. balanced forces
  4. unbalanced forces
Grade 9 Forces and Motion
Which of the following is the unit of work?
  1. N
  2. Kg
  3. W
  4. J
Grade 9 Forces and Motion
Which of the following is a method of reducing friction?
  1. powdering
  2. roasting
  3. frying
  4. storing
Grade 9 Forces and Motion
Which of the following exerts the strongest gravitational force on you?
  1. Earth
  2. the Sun
  3. the Moon
  4. the stars
Grade 9 Forces and Motion
Cars have difficulty stopping on ice because of
  1. rolling friction.
  2. sliding friction.
  3. fluid friction.
  4. centripetal force.
Grade 9 Forces and Motion
Which of the following relationships is correct?
  1. 1 N = 1 kg
  2. 1 N = 1 kg . m
  3. 1 N = 1 kg.m/s/s
  4. 1N = 1kg.m/s
Grade 9 Forces and Motion
Newton's third law uses scalar quantities.
  1. True
  2. False
Grade 9 Forces and Motion
This force causes objects to wear out, creates heat, opposes motion, and can be reduced with the use of lubricants.
  1. gravitational force
  2. frictional force
  3. normal force
  4. tensional force
Grade 9 Forces and Motion
What is the invisible force of attraction between masses?
  1. remote-sensing
  2. free-fall
  3. gravity
  4. ultraviolet radiation
  5. ozone concentration layer
  6. none of the above
Grade 9 Forces and Motion
If a ball rolls down an inclined plane and picks up a speed of 4 m/s each second it rolls, its acceleration is
  1. one half of 4 m/s.
  2. one half of 4 m/s squared.
  3. 4 m/s squared.
  4. 10 m/s squared.
Grade 9 Forces and Motion
Why does a dropped feather hit the ground later than a rock dropped at the same time?
  1. The weight of the rock
  2. The mass of the rock
  3. The air resistance on the feather
  4. Feathers are designed for flight
Grade 9 Forces and Motion
Which of the following does NOT require direction?
  1. Velocity
  2. Acceleration
  3. Force
  4. Speed
  5. Displacement
Grade 9 Forces and Motion
An object with a mass of 1 kilogram on Earth
  1. has less mass on the Moon.
  2. has the same mass on the Moon.
  3. has more mass on the Moon.
  4. weighs the same everywhere.
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