[Sec 2 Maths: Pythagoras' Theorem] The following question features an important problem-solving heuristic that is beneficial for many students. You can assume an unknown length using algebra, and solve for unknowns using formulae you've learned before. This is a vital problem-soling heuristic that can be used for many, MANY questions in the future. Make sure to practice with this as much as you can!
[S2 Science & beyond: Forces] Pulleys often offer a mechanical advantage. But what does that actually mean? The following video helps to clarify some of your doubts. If you still remember your formulae (I hope you do! You awesome, clever kiddo who actually bothers reading this blog) you might recall that Work Done = Force Applied x Distance in the direction of the force. (W = F x D) To summarise, a pulley maintains the total amount of work done (W) by increasing the distance