Friction

What is friction?

• A type of force that occurs when two objects are attracted to each other due to their magnetic properties

• The resistance experienced by an object when it moves through a vacuum

• A process in which two objects come into contact and exchange electrons, resulting in the generation of static electricity.

• The force that opposes the relative motion or tendency of motion between two surfaces in contact

How does friction affect the motion of an object?

• Friction increases the speed of the object

• Friction has no effect on the motion of an object

• Friction decreases the speed of the object

• Friction changes the direction of the object's motion

What is NOT a way to decrease friction?

• Using vaseline to make a Rubik's cube turn faster

• Using magnetic forces to lift a maglev train above its rails

• Applying sand onto someone's hands to increase grip

• Using pencils to move the object faster

Which action increases friction?

• Using oil to lubricate the surfaces

• Using air pressure to separate the surfaces

• Using card paper instead of normal A4 paper as a surface

• Using magnetic forces to repel the surfaces

Which surface would increase friction the most?

• Sand paper

• Foam

• A4 Paper

• Plastic wrapping

How can friction be reduced in a mechanical system?

• By increasing the weight of the objects in contact

• By increasing the surface area of the objects in contact

• By applying a lubricant to the surfaces in contact

• By increasing the speed of the objects in contact

What is the primary purpose of lubricants in reducing friction between two surfaces?

• Lubricants increase the weight of the objects, thereby reducing friction.

• Lubricants alter the color of the surfaces, reducing friction.

• Lubricants change the shape of the surfaces, reducing friction.

• Lubricants create a thin layer between surfaces, reducing friction by minimizing direct contact.

The ____ of contact of the surfaces does not affect the magnitude of friction

Ancient Egyptians used rolling ______ to move heavy stones more easily

What effect does the absence of friction have on the movement of objects?

• Objects move faster without friction

• Objects move slower without friction

• Objects stop moving without friction

• Objects change direction without friction