Unit 6. Forces (part 1)

____________ is an action that causes objects to move. It can

make objetcs go faster or change direction.

____________ happens when an objetct moves against another solid object,

liquid or gas and it causes resistence.

____________ happens when there

is physical contact with an object

• non-contact force

• contact force

____________ don't need physical contact for objects to move.

• non-contact forces

• contact forces

What type of friction does it happen? "a round object rolls

on top of a solid surface"

• sliding friction

• fluid friction

• rolling friction

What type of friction does it happen? "an objetct moves

across a solid surface"

• sliding friction

• fluid friction

• rolling friction

What type of friction does it happen? "an object meets

a liquid or a gas as it moves"

• sliding friction

• fluid friction

• rolling friction

Examples of contact forces are:

• pushing

• gravity

• magentic

• pulling

Examples of non-contact forces are:

• pushing

• gravity

• magentic

• pulling

____________ is the ability an objects has to float in a fluid.

• Buoyance

• Upthrust