Friction Basics

What is friction?

• Friction is the force that opposes the motion of an object.

• Friction is the force that accelerates the motion of an object.

• Friction is the force that attracts objects together.

• Friction is the force that causes objects to float.

Name the three types of friction.

• static friction, kinetic friction, rolling friction

• sliding friction

• fluid friction

• magnetic friction

Which type of friction occurs when an object moves through a fluid?

• Static friction

• Fluid friction or drag

• Kinetic friction

• Rolling friction

Which type of friction occurs when an object is at rest?

• Dynamic friction

• Static friction

• Kinetic friction

• Fluid friction

Which type of friction occurs when an object is sliding over another object?

• Rolling friction

• Kinetic friction

• Frictionless

• Static friction

How does friction affect the motion of objects?

• Friction has no effect on the motion of objects

• Friction acts as a resisting force that hinders the motion of objects.

• Friction increases the speed of objects

• Friction causes objects to float

What are some ways to reduce friction?

• Using rough surfaces

• Applying more pressure between surfaces

• Increasing the weight of objects in contact

• Using lubricants, polishing surfaces, using ball bearings, and reducing the weight of objects in contact.

Name a lubricant that helps reduce friction.

• oil

• sand

• water

• sugar

How does adding lubricant reduce friction?

• Lubricant evaporates when applied, leaving surfaces dry and increasing friction.

• Lubricant creates a barrier between surfaces, preventing direct contact and reducing friction.

• Lubricant increases friction by creating more surface area for contact.

• Lubricant attracts debris that enhances friction between surfaces.

What is the purpose of using ball bearings in machines?

• To improve the machine's appearance

• To reduce friction between moving parts

• To generate electricity

• To increase the weight of the machine