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Eighth Grade (Grade 8) Forces and Motion Questions

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Grade 8 Forces and Motion
A force is a                     .
  1. constant speed
  2. push or pull
  3. linear quantity
  4. cannot be determined
Grade 8 Forces and Motion
A force
  1. causes all motion.
  2. starts stationary objects moving.
  3. stops moving objects.
  4. is an interaction between two or more objects.
  5. all of the above.
Grade 8 Forces and Motion

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

When one object exerts a force on another, the second object exerts an equal and opposite force on the first.

Which law matches the description?
  1. Newton's 1st Law of Motion
  2. Newton's 3rd Law of Motion
  3. Newton's 2nd Law of Motion
Grade 8 Forces and Motion
If two forces act on an object in the same direction, the net force is the
  1. difference of the two forces.
  2. sum of the two forces.
  3. only one of the forces acts on the object.
  4. neither force can affect the object.
Grade 8 Forces and Motion
The acceleration of an object is directly proportional to the force acting on it and inversely proportional to its mass.

Which law matches the description?
  1. Newton's 2nd Law of Motion
  2. Newton's 3rd Law of Motion
  3. Newton's 1st Law of Motion
Grade 8 Forces and Motion
This is a push, pull, or any action that has the ability to change motion.
  1. Friction
  2. Force
  3. Newton's 1st Law of Motion
Grade 8 Forces and Motion
Which best describes the motion of the object recorded in data table?
Data Table - Constant Speed
  1. It does not move.
  2. It maintains a constant velocity.
  3. It undergoes positive acceleration.
  4. It undergoes negative acceleration.
Grade 8 Forces and Motion
Acceleration refers to                   .
  1. increasing speed
  2. decreasing speed
  3. changing direction
  4. all of the above
Grade 8 Forces and Motion
The size or amount of a force is known as its                .
  1. net force
  2. direction
  3. magnitude
  4. constant speed
Grade 8 Forces and Motion
In the formula for speed, you must
  1. multiply the distance and the time.
  2. add the distance and the time.
  3. divide the distance by the time.
  4. multiply the speed and the time.
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