which produces greater friction .............. a-Rougher surfaces b-smooth surfaces.
a-Rougher surfaces
Friction is a force that acts in an ___________ direction of movement. a-similar b-opposite
b-opposite
Is a force that works against motion between object & medium touching.
friction
hich of these materials do you predict would have the MOST amount of friction, Sand paper or Tile?
Sand paper
Which of the following is an example of friction that is helpful? a-Brakes used on a bike b-Tires from a car on the road c-Tread on the bottom of your shoes d-All are examples that are helpful
d-All are examples that are helpful
True or false :Friction can make things slow down or stop.
True
True or False: Friction speeds up moving objects.
False: Friction slows down moving objects.
Factors affect the friction force . a-type of surfaces b-The weight c-both
c-both
What is the type of force when 2 surfaces rub together?
Friction
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