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Eighth Grade (Grade 8) Forces and Motion Questions

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Grade 8 Forces and Motion

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Motion is
  1. anything with speed.
  2. the change of position over time.
  3. the way you move something.
  4. an object with force.
Grade 8 Forces and Motion
Which shows the formula for calculating speed?
  1. Speed = time x position
  2. Speed = time x mass
  3. Speed = distance/time
  4. Speed = time/velocity
Grade 8 Forces and Motion
Motion can be measured by                 .
  1. speed
  2. velocity
  3. acceleration
  4. all of the above
Grade 8 Forces and Motion
Newton's second law of motion states the relationship of mass, acceleration, and force. It states that
  1. force equals mass divided by acceleration.
  2. force equals acceleration divided by mass.
  3. force equals mass times acceleration.
  4. every object attracts every other object in the universe.
Grade 8 Forces and Motion
An example of rolling friction is
  1. using oil to lubricate.
  2. wheels on your skateboard.
  3. dragging your sister across the floor on a blanket.
  4. the little mermaid swimming through the ocean.
Grade 8 Forces and Motion
Which law of motion is explained by the equation: Force = mass x acceleration?
  1. Newton's 1st Law of Motion
  2. Newton's 2nd Law of Motion
  3. Newton's 3rd Law of Motion
Grade 8 Forces and Motion
A velocity-time graph of a moving object is shown. Which statement best describes the object's velocity between points D and E?
Velocity Vs. Time
  1. The object's velocity is increasing.
  2. The object's velocity is decreasing.
  3. The object's velocity is constant.
  4. The object is stopped.
Grade 8 Forces and Motion
Which shows the formula for velocity?
  1. A=ΔVΔt
  2. V=dt
  3. F=M×A
  4. N=1Kg×1ms2
Grade 8 Forces and Motion
Which law of motion states that an object in motion will stay in motion and an object at rest will stay at rest unless acted upon by an unbalanced force?
  1. Newton's 1st Law of Motion
  2. Newton's 2nd Law of Motion
  3. Newton's 3rd Law of Motion
Grade 8 Forces and Motion
                  is the motion of an object in a complete circle.
  1. Rotational motion
  2. Periodic motion
  3. Linear motion
Grade 8 Forces and Motion
Which law of motion explains how a rocket lifts off the ground?
  1. Newton's 1st Law of Motion
  2. Newton's 2nd Law of Motion
  3. Newton's 3rd Law of Motion
Grade 8 Forces and Motion
Which force results from relative motion between objects?
  1. net force
  2. inertia
  3. friction
Grade 8 Forces and Motion
Which law of motion states that every action has an equal and opposite reaction?
  1. Newton's 1st Law of Motion
  2. Newton's 2nd Law of Motion
  3. Newton's 3rd Law of Motion
Grade 8 Forces and Motion
The momentum of a 1,500-kg car traveling at a velocity of 10 m/s is                           .
  1. 15,000 N
  2. 15ms2
  3. 150 N
  4. 15,000kg⋅ms
Grade 8 Forces and Motion
Which of the following is the unit of measurement for force?
  1. friction
  2. newton
  3. weight
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