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- 1. Multiple Choice
What is the resultant force here? 20N to the left and 16N to the right.
36N
4N
20N
16N
- 2. Multiple Choice
This man is pushing against friction of 20N with a power of 10N. Will the box move?
No
Yes
- 3. Multiple Choice
Is it possible to reduce friction?
No
Yes
- 4. Multiple Choice
What are some ways to reduce friction? Check all that apply.
Use Lubricants
Polish rough surfaces
Smoothen it
Spread sand over the surface
Use Ball bearings
- 5. Multiple Choice
Tin needs to go ice skating. She takes her skates and go outside. What is the science behind being able to ice skate?
The skates are designed in a special way; this enables the skates to slide with reduced friction. The skates decrease friction.
The ice rink is slippery, the skates help her get a grip. The skates increase friction.
- 6. Multiple Choice
Sportmen's shoes have spikes in them. What is a possible reason for this?
The spikes help them in getting a grip.
Spikes help them slide and run faster from their opponent.
- 7. Multiple Choice
Roller skates are an example for _______ friction.
sliding
rolling
static
pleasant
- 8. Poll
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