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Eighth Grade (Grade 8) Mechanics 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 Energy and Momentum
Any energy that is stored is called                 energy.
  1. kinetic
  2. cooking
  3. potential
  4. thermal
  5. sound
  6. electrochemical
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 Energy and Momentum
The energy of matter in motion is                .
  1. electromagnetic
  2. potential
  3. chemical
  4. kinetic
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 Fluid Mechanics
According to Boyle's law, if the pressure placed upon a gas is increased, then                              .
  1. the volume will increase
  2. the volume will decrease
  3. the temperature will increase
  4. the temperature will decrease
Grade 8 Forces and Motion
Acceleration refers to                   .
  1. increasing speed
  2. decreasing speed
  3. changing direction
  4. all of the above
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