Force: Contact & Noncontact

What is a force?

• A shape of an object

• A push or pull on an object

• A color of an object

Which of these is a contact force?

• Gravity

• Friction

• Magnetism

A girl pulls a sled with a rope. This is an example of:

• Non-contact force

• No force at all

• Contact force

Which of these is not a contact force?

• A. Tension

• Electrostatic force

• Air resistance

Which force slows down a car moving on the road?

• Gravity

• Friction

• Magnetic force

Which force pulls objects towards Earth?

• Gravitational force

• Tension force

• Magnetic force

What happens when the poles of two magnets are the same?

• They attract

• They explode

• They repel

Air resistance is a type of:

• Magnetic force

• Contact force

• Non-contact force

Gravity works even when:

• Objects are not touching

• You push something

• You rub surfaces

Which of the following forces happens when two surfaces rub together?

• • Friction

• Gravity

• Electrostatic