A book sliding across a desk will come to a stop because of the force of _______.
gravitational
frictional
The type of friction that acts on a falling object is called _______.
What is the force responsible for pulling us down to Earth?
friction
gravity
Brushing your hair and putting on a pair of socks are examples of _____.
push
A _____ is a piece of iron or steel that attracts another metal.
magnet
copper
