End-of-unit 5 test: Forces and Magnetism

Name the forces acting on this sailing boat: What is the force labeled 'a' acting on the sailing boat?

• Weight (gravity)

• Buoyant force

• Wind force

• Frictional force

Name the forces acting on this sailing boat: What is the force labeled 'b' acting on the sailing boat?

• Upthrust (buoyancy)

• Friction

• Thrust

• Air resistance

Name the forces acting on this sailing boat: What is the force labeled 'c' acting on the sailing boat?

• Thrust (from the wind)

• Gravity

• Buoyant force

• Friction

Name the forces acting on this sailing boat: What is the force labeled 'd' acting on the sailing boat?

• Drag (water resistance)

• Lift (wind force)

• Buoyant force

• Thrust (from the sail)

Paper clips are attracted to a bar magnet because:

• they are made of plastic

• they are made of magnetic material

• they are non-magnetic

• they are electrically charged

What is the independent variable in this investigation?

• The independent variable

• The dependent variable

• The control variable

• The constant variable

What is the dependent variable in this investigation?

• The dependent variable

• The independent variable

• The control variable

• The constant variable

Why must they do this?

• Because it is required.

• Because they want to.

• Because it is fun.

• Because it is optional.

The second magnet did not attract as many paper clips as the first magnet. Which magnet is the strongest?

• The first magnet

• The second magnet

• Both are equally strong

• Neither magnet

Suggest a way the learners could check that their results were reliable.

• Repeat the experiment and compare the results.

• Change the hypothesis and try again.

• Ignore any outliers in the data.

• Only record the results once.