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How to do those kind of lift go up/down then the force change then also involves acceleration questions?

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how does angle affect the tension in strings eg picture hanging on the wall qns

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http://phyglossary.pbworks.com

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Since block moves right and left and that velocity involves direction, would the graph look like this instead?

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Q3b

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Dear Mr Ang,
For Approach 1, since the final step is a subtraction equation, should the final answer have 1 decimal place (10.5 N)?
Thank you!

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Dear Mr Ang,
In general, for any question that asks us to find a vector quantity such as a force or acceleration, are we required to state its direction in our answer even if it is not stated in the question?
Thank you!

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Is it necessary for us to differentiate the different resultant forces we calculate using subscripts even though they are in different parts of the question? Will we be penalised if we do not?
Thank you!

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1) For part (a), is the 10.0 N force acting on box P tension?
2) For free-body diagrams, when are we expected to label the magnitude of the force? Are we expected to label the “doer” and the “receiver” of the force?
3) For free-body diagrams and scale diagrams, what do we draw in pencil and what do we draw in pen? Thank you!

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For the direction of the force, is it correct to write “62 degrees anticlockwise from the normal contact force”?

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1) Is it better if we label the third force as “normal contact force” on the scale diagram?
2) For the calculation of the force that involves multiplication, why do we not follow the rule for significant figures and round 116 N off to 2 significant figures?
Thank you.

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Why is direction required for this question only?

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For Method 2, why must the answers for Fw and the angle from the vertical be rounded off? It does not follow the rules for significant figures.

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For intermediate working, do we ignore the rules of s.f. and d.p. and express answers to 3/4 s.f. (since final answer is to 2/3 s.f.)?
For example, to find a force:
W = sin 40 x 40 N ~ 25.7 N (instead of 26 N)
F = 45 N - 25.7 N ~ 19 N

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Why is the net force on the kite equal and opposite to the original tension? Thank you!

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for question 11b why is the weight of P considered normal contact force? 

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for question 11b why is the weight of P considered normal contact force? 