Question 10
FA steel paper clip is tied to a thread. The other end of the thread is taped to a bench.
A magnet is held above the paper clip so that the paper clip stays in the air without touching the magnet.
The Figure shows the apparatus.
Figure
a.[2]
Name the force that the magnet exerts on the paper clip. State whether it is a contact force or a non-contact force.
b.[2]
Give the force that forms an interaction pair with the force that the magnet exerts on the paper clip. Give its direction.
c.[2]
The student slowly moves the magnet upwards, away from the paper clip.
The paper clip falls onto the bench.
Explain why.
d.[2]
The student replaces the paper clip with a small piece of aluminium foil of the same weight.
Explain why the foil cannot be held in the air in the same way.
9.1 Forces and vectors Questions
93 exam-style questions on Edexcel GCSE Physics 9.1 Forces and vectors, covering 9.1.1 Interactions and types of force, 9.1.2 Vector and scalar quantities, and 9.1.3 Vector diagrams and free body diagrams. Each one has a worked solution and a mark scheme showing where the marks go.