Contact forces | Exit Quiz | Oak National Academy

Forces are ___ and pulls.

Answer explanation

Forces are pushes and pulls.

Which of these activities involves both pushing and pulling?

• 
• 
• 

Answer explanation

Rowing a boat uses pushes and pulls to move the oars backwards and forward.

Match the forces word to the activity.

• pull

• ringing a doorbell

• pull

• using a zip to fasten a coat

• push

• taking part in a tug of war competition

• push

• using a remote control

Answer explanation

Using a remote control and ringing a doorbell and pushes. Using a zip and a taking part in a tug of war competition are pulls.

Contact forces act between objects that are ___ each other.

Answer explanation

Contact forces act between objects that are touching each other.

Which of these statements about skating is true?

• When skating, there are no contact forces.

• Skating uses contact forces.

• When skating, the wheels of the skate make contact with the floor.

Answer explanation

Skating is an example of a contact force. When skating, the wheels of the skate make contact with the floor.

Which of these involves contact forces?

• an apple falling off a tree

• pushing a wheelchair

• rolling a bowling ball

• a magnet sticking to a fridge

Answer explanation

Pushing a wheelchair and rolling a bowling ball use contact forces.