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Eighth Grade (Grade 8) Physics Questions

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Grade 8 :: Forces and Motion by wlemerson
Grade 8 :: Forces and Motion by wlemerson
Grade 8 :: Forces and Motion by wlemerson
A force is a
  1. constant speed
  2. push or pull
  3. linear quantity
  4. cannot be determined
Grade 8 :: Forces and Motion by wlemerson
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 :: Heat Transfer by Testmaker1156
What is convection?
  1. Transfer of heat by the movement of currents within a fluid
  2. Transfer of heat from one particle to another without the movement of matter
  3. The transfer of energy by electromagnetic waves
  4. A conductor
  5. An insulator
Grade 8 :: Forces and Motion by wlemerson
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 by ncarlson0923
Grade 8 :: Forces and Motion by wlemerson
Grade 8 :: Forces and Motion by wlemerson
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 by wlemerson
The rate at which velocity changes over time.
  1. speed
  2. acceleration
  3. Newton
  4. force
Grade 8 :: Forces and Motion by wlemerson
The formula for velocity.
  1. [math]A=(ΔV)/(Δt)[/math]
  2. [math]V=d/t[/math]
  3. [math]F=M*A[/math]
  4. [math]N=1 Kg*1m/s^2[/math]
Grade 8 :: Forces and Motion by ncarlson0923
When is the velocity of an object constant?
  1. when only its speed changes
  2. when only its direction changes
  3. when its speed and its direction both change
  4. when neither its speed nor its direction change
Grade 8 :: Forces and Motion by ncarlson0923
Why is Newton's first law sometimes called the law of inertia?
  1. because inertia is the tendency of objects to resist changes to their motion
  2. because inertia describes the application of force to an object at rest
  3. because inertia describes the applications of force to an object in motion
  4. because inertia is the same thing as friction
Grade 8 :: Forces and Motion by ncarlson0923
What features determine an object's acceleration?
  1. the forces acting on it and its size
  2. the forces acting on it and its mass
  3. the forces acting on it only
  4. its weight and its mass
Grade 8 :: Simple Machines by bamabryson
What is the formula for mechanical advantage?
  1. input force divided by output force
  2. output work divided by input work
  3. output force divided by input force
Grade 8 :: Simple Machines by bamabryson
A wheelbarrow is an example of
  1. second-class lever
  2. wheel and axle
  3. inclined plane
Grade 8 :: Magnetism and Electricity by Rccola
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