In question 8 you can draw the vector diagram so all the forces form a right angle triangle but in question 15 you can't, but why is it you can for one and not the other and how do i recognise when i should do a right angled triangle, sorry for the poor picutre, here is a link to the actual worksheet:https://pmt.physicsandmathstutor.com/download/Physics/A-level/Topic-Qs/Edexcel/02-Mechanics/Set-N/Newton's%20Laws%20and%20Momentum.pdf
nevermind i realised why
>>1563909the forces don't need to be perpendicular to facilitate adding upYou can draw any set of forces and add them up.Perhaps you have this misconception because you have only exposed yourself to scenarios where there are only vertical and horizontal forces
>>1563909How can something weigh "2 newtons"?
>>1563941weight is the resulting force applied to an object by gravity, or the force required to stop it from accelerating downwarda 1.2 kg object weighs 2 N on the Moon, but 12 N on Earth you can work with weights without assuming anything about masses or about the gravitational field in which the experiment takes place
>>1564001Okay, thanks.Few weeks ago I was reading about "negative zero" and it felt like I was having a stroke.
>>1564034negative zero exists but only in computer science, not in actual mathematics. it's basically just a computer science fuckup from back when people were still figuring out how to do computer science
