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8 questions
What is the resultant force here? 20N to the left and 16N to the right.
36N
4N
20N
16N
This man is pushing against friction of 20N with a power of 10N. Will the box move?
No
Yes
Is it possible to reduce friction?
No
Yes
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
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.
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.
Roller skates are an example for _______ friction.
sliding
rolling
static
pleasant
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