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Friction is the force that acts against you when you try to move something heavy.
True
False
The ________ the surface, the stronger the friction.
smoother
rougher
Friction produces ______, like when you rub your hands together.
light
heat
Friction is ________ when it helps us grip the floor with our shoes
not useful
useful
Friction ______ car tyres from skidding.
stop
start
Which activity has little friction?
climbing rocks
skating
Smooth surfaces have no friction at all.
True
False
Friction acts in the same direction that the object is moving in.
True
False
Force cannot be measured.
False
True
a tool to measure force
forcemeter
thermometer
