Free Body Diagrams & 3rd law pair forces.

AI Thread Summary
The discussion revolves around two physics questions related to free body diagrams and third law pair forces. The user seeks clarification on their attempts to illustrate forces acting on a magnet and a pendulum, specifically identifying the correct forces and their directions. For Q1, they correctly identified the weight and reaction force on the magnet but are unsure about additional forces. In Q2, they noted tension and weight on the pendulum but expressed uncertainty about the forces acting on the Earth. Assistance is requested to correct their solutions and clarify their understanding of these fundamental physics concepts.
JasonS
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Homework Statement



I have 2 questions from a practice test paper that I can't do (I missed the lessons) - I've attached them, the other questions I did fine. They should be quite basic but I'm not sure if what I'm doing is right (only done physics for 2 weeks). If anyone could correct my current solutions, and/or help on the others that would be great.2. The attempt at a solution

In Q1 (a) I put on weight/reaction force on the magnet... and I know that there would be another force acting on it (from the other magnet) but I don't know where to draw it, or what it would be called.

In Q1 (b) I put the reaction to weight, upwards in direction acting on the earth.

In Q2 (a) I drew tension/weight on the pendulum and just weight on the earth.

Q2 (b) I'm not really sure about.If anyone could help that would be greatly appreciated. Sorry for my English, it isn't my first language. Thanks in advance.
 

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JasonS said:
In Q1 (a) I put on weight/reaction force on the magnet... and I know that there would be another force acting on it (from the other magnet) but I don't know where to draw it, or what it would be called.

In Q1 (b) I put the reaction to weight, upwards in direction acting on the earth.
Three forces act on the magnet. What are they and in what direction do they act? What's the third law pair for each force?

In Q2 (a) I drew tension/weight on the pendulum and just weight on the earth.

Q2 (b) I'm not really sure about.
On the pendulum, two forces act. For the orbiting earth, how many forces act?
 

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