Question

Imagine that an object is falling through a long straight glass tube held vertical; air has been removed completely from the tube. The object does not touch the walls of the tube. Will the object experience any force of friction?
[2 marks]
[Exemplar]
[Fluid friction]

Answer 1

Solution:
No, the object will not experience any frictional force.
[1 mark]

Due to the absence of air and contact with the glass tube, there is nothing to provide friction.
[1 mark]