13. There are two main
categories of forces —
contact forces and
non-contact forces.
14. Contact forces result from two
objects touching each other.
dribbling a
basketball
kicking a
soccer ball
hitting a
shuttlecock
15. Non-contact forces act on an object
without coming into contact with
another object.
gravitational
force
magnetic
force
electrostatic
force
16. Magnetic force is a
force that attracts
or repels magnetic
objects. It is the
push or pull exerted
by a magnet.
17. Gravitational force is
the force by which an
object attracts another
object towards itself.
The Earth pulls objects
towards itself due to
its gravitational force.