a student made the table shown to list some contact and non-contact forces.
examples of forces
contact forces
non-contact forces
the force applied by a magnet on an iron nail the force applied by an electromagnet on a wire
the force applied by a student on a door to open it the force applied by the planets on each other
which statement best explains why the table is incorrect?
a-magnetic force is a force acting at a distance.
b-the student applies a non-contact force on the door.
c-the electromagnet and wire have to be in contact to apply the force.
d-gravitational force acts between planets only when they are in contact