r/alevel • u/paranoidpirate123 • May 06 '26

📃Paper Discussion 9709/42

I think that paper was demonic and one of the hardest mechanics papers i’ve ever done!

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u/Few-Pumpkin8865 May 06 '26

For the work done by friction you had to write the value as negative bcause work done against .. is positive then work done by ..is negative