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Ninth Grade (Grade 9) Forces and Motion Questions

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Grade 9 Forces and Motion
A change in position is called                .
  1. motion
  2. displacement
  3. acceleration
  4. velocity
Grade 9 Forces and Motion
If an object is at rest, it experiences motion.
  1. True
  2. False
Grade 9 Forces and Motion
What is the formula for speed?
  1. speed=distance/displacement
  2. speed=time/speed
  3. speed=time/distance
  4. speed=distance/time
Grade 9 Forces and Motion
A push or pull that one body exerts on another is                .
  1. velocity
  2. force
  3. mass
  4. acceleration
Grade 9 Forces and Motion
The greater the inertia, the greater an object's                .
  1. speed
  2. mass
  3. velocity
  4. acceleration
Grade 9 Forces and Motion
An object will remain at rest if the forces acting on it are                .
  1. constant
  2. positive
  3. unbalanced
  4. balanced
Grade 9 Forces and Motion
Why does a body performing uniform circular motion has constant speed but variable velocity?
  1. It experiences a centripetal force.
  2. Its centripetal force and centrifugal forces balance each other.
  3. It experiences centrifugal force.
  4. Its direction of motion changes.
Grade 9 Forces and Motion
Which of the following quantities is scalar?
  1. displacement
  2. force
  3. mass
  4. velocity
Grade 9 Forces and Motion
What is speed?
  1. a change in position
  2. distance traveled per unit of time
  3. the rate of change of velocity
  4. measure of how far an object has moved
Grade 9 Forces and Motion
The constant force of attraction between all objects with mass is called
  1. inertia.
  2. adhesion.
  3. gravity.
  4. electromagnetism.
Grade 9 Forces and Motion
What is distance?
  1. a change in position
  2. a measure of how far an object has moved
  3. the distance and direction of an object's change on position from a reference point
  4. the distance traveled per unit of time
Grade 9 Forces and Motion
Which of the following is the unit of force?
  1. N
  2. Kg
  3. W
  4. J
Grade 9 Forces and Motion
IF we consider a planet in orbit around the Sun as an example of object moving in circular motion, what best represents the centripetal force?
  1. The inertia of the planet moving forward in a straight line
  2. The momentum of the planet moving forward in a straight line
  3. The mass of the planet and the Sun
  4. The gravitational pull of the Sun
Grade 9 Forces and Motion
You can reduce friction, but you cannot avoid it.
  1. True
  2. False
Grade 9 Forces and Motion
The slope of the straight-line displacement time graph indicates                        .
  1. acceleration at instant
  2. distance traveled
  3. uniform acceleration
  4. uniform velocity
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