C9 Type of Forces

Which action/scenario involve applying a force?

• Building collapsing due to Earthquake.

• Kicking a soccer ball upwards

• Opening a food can.

• Watching a news report on natural disaster.

what is a force?

• push

• pull

what is the S.I. unit for force?

• joules (J)

• metre (m)

• newton (N)

• Pascal (Pa)

Which scenario shows that a magnetic force is applied?

• Compass pointing to the north.

• magnet attracting iron to separate from the non-magnetic materials.

• a car braking in front of a traffic light.

• Walking on earth surface.

Which scenario shows that friction is applied?

• Compass pointing to the north.

• holding a pen

• a car braking in front of a traffic light.

• Walking on earth surface.

forces that are in physical contact between objects

• contact forces

• non-contact forces

forces that are not in physical contact between objects

• contact forces

• non-contact forces

What are some examples of contact forces?
(You may select more than 1 answer)

• elastic force

• friction

• gravitational force

• magnetic force

What are some examples of non-contact forces?
(You may select more than 1 answer)

• elastic force

• friction

• gravitational force

• magnetic force

A rubber band is stretched. Which type of force is being applied?

• Elastic force

• magnetic force

• friction

• gravitational force