IB Physics Topic 2 - Question example - Forces and force diagrams

This is a worked example of an IB past paper question on forces and force diagrams. IB standard level.

[@sanketdoddabendigere2172]

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[@liamrogers9905]

Bit dated now, but I absolutely just needed someone to say how to find the pulling down the slope part of mg. Somehow I never wrote in my notes that it’s sin times the angle times mg. Thanks