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WorksheetsCh-12 Friction
Total questions: 16
Worksheet time: 14mins
a friction force that acts on objects that are not moving
static friction
sliding friction
fluid friction
rolling friction
The picture shows a boy pulling
a box. How can he move the box
more easily?
Using wooden rollers.
Put a cloth under the box and pull it using the cloth.
Create a pattern on the surface of the box.
Ensure the surface of the box is clean.
The use of lubricants in motor vehicles ______________
the excessive frictional force in the engine
compartment.
reduces
increases
reuses
enlarge
Rougher surfaces have ...
greater friction
lesser friction
the same level of friction
Who will experience more friction?
A
B
Which of these does not describe friction?
A force opposing motion
When microscopic bumps rub against each other
When you get a carpet burn from sliding along
When you speed up on ice
Only solids can produce friction
true
false
Which of the following answers is the most scientific answer for the question:
What is friction?
The random force between two solids, liquids, or gases.
The contact force between two solids, liquids, or gases that slide past one another.
The thing that creates static electricity
A force that is random
