Want to see correct answers?
Login or join for free!
  Physics Worksheets
Looking for Physics worksheets?
Check out our pre-made Physics worksheets!
Share/Like This Page
Filter By Grade

You are browsing Grade 8 questions. View questions in All Grades.

Kindergarten Grade 1 Grade 2 Grade 3 Grade 4 Grade 5 Grade 6 Grade 7 Grade 8 Grade 9 Grade 10 Grade 11 Grade 12 College Graduate

Browse Questions

Eighth Grade (Grade 8) Mechanics Questions

You can create printable tests and worksheets from these Grade 8 Mechanics questions! Select one or more questions using the checkboxes above each question. Then click the add selected questions to a test button before moving to another page.

Previous Page 4 of 23 Next
Grade 8 Energy and Momentum
Why is it more efficient to move a box up a ramp on wheels than sliding it?
  1. The wheels reduce the pull of gravity.
  2. Rolling friction is weaker than sliding friction, so you lose less work.
  3. Wheels increase the normal force on a box.
  4. None of the above
Grade 8 Energy and Momentum
Which of the following best describes the concept of work?
  1. a force applied to an object
  2. a force moves an object through a distance
  3. the transformation of energy
  4. the rate at which energy is transformed
Grade 8 Energy and Momentum
The energy obtained from the digestion of food is called                .
  1. heat
  2. nuclear
  3. mechanical
  4. chemical
Grade 8 Forces and Motion
You can increase friction by
  1. making the surfaces rougher.
  2. using oil or another lubricant.
  3. putting the object on wheels.
  4. asking a friend to help push or pull.
Grade 8 Forces and Motion
If two forces act on an object in opposite directions, the net force
  1. is the difference of the two forces.
  2. is the sum of the forces.
  3. is the only one of the forces can act on the object.
  4. cannot be determined.
Grade 8 Energy and Momentum
Which statement correctly compares the potential energy of the balls?
Potential Energy
  1. C has more potential energy than B.
  2. E has more potential energy than F.
  3. D has less potential energy than E.
  4. B has less potential energy than A.
Grade 8 Energy and Momentum
Electrons flowing along a copper wire is an example of what type of energy?
  1. Thermal
  2. Radiant
  3. Electrical
  4. Mechanical
Grade 8 Forces and Motion
Which shows the formula for acceleration?
  1. A=VF-VITF-TI
  2. F=M×A
  3. V=dt
  4. A=ΔTΔV
Grade 8 Forces and Motion
In which of these do you need to know the direction in which the object is moving?
  1. velocity
  2. instantaneous speed
  3. average speed
  4. mass
Grade 8 Forces and Motion
How fast something moves over a certain distance
  1. length
  2. instantaneous speed
  3. average speed
Grade 8 Forces and Motion
Earth rotates west to east. According to Newton's first law of motion, which should occur if you jumped straight up?
  1. you land east of where you jumped from
  2. you land west of where you jumped from
  3. you land in the same place you jumped from
Grade 8 Forces and Motion
A Newton is equal to                                .
  1. the amount of mass in an object
  2. mass times velocity
  3. mass times speed
  4. mass times acceleration
Grade 8 Forces and Motion
The formula for velocity is v=distance x time.
  1. True
  2. False
Grade 8 Forces and Motion
Use the data table to calculate the acceleration of the object in question.
Data Table - Positive Acceleration
  1. 2m/s/s
  2. 8m/s/s
  3. 20m/s/s
  4. 32m/s/s
Grade 8 Forces and Motion
Which is NOT true about balanced forces?
  1. are equal in size
  2. act in the same direction
  3. do not cause a change in motion
  4. act in opposite directions
Previous Page 4 of 23 Next