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- 1. Multiple Choice
Frictional force acts in the .................. direction of motion
same
upward
opposite
downward
- 2. Multiple Choice
The rougher the surface, the greater the frictional force of the object.
True
False
- 3. Multiple Choice
Which of this picture has useful frictional force?
- 4. Multiple Choice
Which friction can be a problem to us?
- 5. Multiple Choice
What are 2 better ways to reduce the frictional force?
applying oil on the machine
not using the ball bearings
reduce the wheels on the suitcase
polishing the surface of the slide
- 6. Fill in the Blank
a force is a . . . . or a . . . .
- 7. Multiple Choice
Which of the following are the correct ways to reduce frictional friction?
the usage of brake on the bike
apply a lubricant (oil) on the moving part of a machine
the soles of shoes prevent us from slipping
use rollers / wheels to move heavy objects
- 8. Multiple Choice
The book will move further along a smooth surface than a rough surface.
true
false
- 9. Multiple Choice
if there were no frictional force, the moving coin would come to a stop on the table.
true
false
- 10. Multiple Choice
A Frictional force can . . . . or . . . . a moving object.
speed up
stop
move
slow down
- 11. Fill in the Blank
when we push or pull an object, we are applying a . . . . to it.
- 12. Multiple Choice
What is the problem of frictional force between the boat and the water?
it speeds up the boat
it slows down the boat
It overheats the boat
the boat will wear out
- 13. Multiple Choice
Why does the man use wheels to move the object?
it will reduce the frictional force
it will increase the frictional force
the object is not heavy
the frictional force between the object and the floor is large
- 14. Fill in the Blank
To reduce the frictional force on the machine, we can use . . .
- 15. Multiple Choice
When there is a greater force to an object, a greater frictional force is needed to move the object.
true
false
- Answer choicesTagsAnswer choicesTags