Friction and Forces

How can friction be reduced?

• reduce the force acting between the 2 surfaces

• reduce the roughness of the 2 surfaces coming in contact

• use wax, grease or oil

• all of the above are ways of reducing friction

Friction and air resistance always exert force...

• in the same direction as the object's motion.

• in the opposite direction of the object's motion.

Tags

NGSS.MS-PS2-2

What is the unit of force?

• Newton, N

• Centimetre, cm

• Kilometre, km

• kilogram, kg

Force is a __________ quantity.

• Vector

• Scalar

On which surface would friction be the greatest?

• carpet

• ice

• snow

• satin

What type of force is shown in the picture?

• The Cat force

• Star Wars Force

• Unbalanced force

• Balanced  force

Tags

NGSS.3-PS2-1

What is a Force?

• The distance

• Mass

• A push or pull

• Give me a  failing grade 

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

An _______ force must act on an object for it to CHANGE it's motion

• balanced

• unbalanced

• gravitational

• electrical

Tags

NGSS.MS-PS2-2

If the net force is equal to zero, the forces acting on the object are

• balanced

• unbalanced

What will cause an object to move?

• Applied forces

• Balanced forces

• Unbalanced forces

Tags

NGSS.MS-PS2-2