What is a contact force?
A force that requires physical contact between two objects.
True or False: Gravity is a contact force.
False
Fill in the blank: The force of _____ pulls objects towards the center of the Earth.
gravity
What are the two main categories of forces?
Contact forces and non-contact forces.
Which of the following is NOT a contact force? A) Friction B) Tension C) Magnetism
C) Magnetism
What is friction?
A force that opposes the motion of an object.
Name one example of a non-contact force.
Gravity, magnetism, or electrostatic force.
True or False: Tension is a type of non-contact force.
False
What is the unit of force in the International System of Units (SI)?
Newton (N)
Fill in the blank: A _____ force acts at a distance without physical contact.
non-contact
What type of force pulls objects towards each other due to their mass?
Gravitational force.
Which force is responsible for moving objects along a surface?
Frictional force.
True or False: Electrostatic force can either attract or repel objects.
True
What happens to the gravitational force between two objects if the distance between them increases?
The gravitational force decreases.
What is the force that can stretch or compress materials called?
Elastic force.
