https://padlet.com/ang_joo_liak/03_dynamics Post any questions you have under the relevant columns. en-us 2019-06-02 05:56:24 UTC 2023-04-19 23:12:48 UTC hello@padlet.com https://imgglb.padletcdn.com/v13/image?t=g_auto&url=https%3A%2F%2Fpadlet.net%2Ficons%2Fpng%2F1f680.png https://padlet.com/ang_joo_liak/03_dynamics/wish/365475667 How to do those kind of lift go up/down then the force change then also involves acceleration questions? ]]> 2019-06-04 04:11:44 UTC https://padlet.com/ang_joo_liak/03_dynamics/wish/365475667 https://padlet.com/ang_joo_liak/03_dynamics/wish/365626065 how does angle affect the tension in strings eg picture hanging on the wall qns]]> 2019-06-04 16:00:34 UTC https://padlet.com/ang_joo_liak/03_dynamics/wish/365626065 ang_joo_liak https://padlet.com/ang_joo_liak/03_dynamics/wish/365810920 http://phyglossary.pbworks.com]]> 2019-06-05 10:43:06 UTC https://padlet.com/ang_joo_liak/03_dynamics/wish/365810920 https://padlet.com/ang_joo_liak/03_dynamics/wish/366467010 Since block moves right and left and that velocity involves direction, would the graph look like this instead?]]> 2019-06-08 07:12:01 UTC https://padlet.com/ang_joo_liak/03_dynamics/wish/366467010 https://padlet.com/ang_joo_liak/03_dynamics/wish/366543088 Q3b]]> 2019-06-09 08:52:50 UTC https://padlet.com/ang_joo_liak/03_dynamics/wish/366543088 7114160372 https://padlet.com/ang_joo_liak/03_dynamics/wish/367142866 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!]]> 2019-06-12 10:29:14 UTC https://padlet.com/ang_joo_liak/03_dynamics/wish/367142866 7114160372 https://padlet.com/ang_joo_liak/03_dynamics/wish/367143363 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!]]> 2019-06-12 10:32:16 UTC https://padlet.com/ang_joo_liak/03_dynamics/wish/367143363 7114160372 https://padlet.com/ang_joo_liak/03_dynamics/wish/367143716 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!]]> 2019-06-12 10:34:37 UTC https://padlet.com/ang_joo_liak/03_dynamics/wish/367143716 7114160372 https://padlet.com/ang_joo_liak/03_dynamics/wish/367145153 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!]]> 2019-06-12 10:43:09 UTC https://padlet.com/ang_joo_liak/03_dynamics/wish/367145153 7114160372 https://padlet.com/ang_joo_liak/03_dynamics/wish/367148670 For the direction of the force, is it correct to write “62 degrees anticlockwise from the normal contact force”?]]> 2019-06-12 11:01:47 UTC https://padlet.com/ang_joo_liak/03_dynamics/wish/367148670 7114160372 https://padlet.com/ang_joo_liak/03_dynamics/wish/367150149 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.]]> 2019-06-12 11:12:27 UTC https://padlet.com/ang_joo_liak/03_dynamics/wish/367150149 7114160372 https://padlet.com/ang_joo_liak/03_dynamics/wish/367154461 Why is direction required for this question only?]]> 2019-06-12 11:42:06 UTC https://padlet.com/ang_joo_liak/03_dynamics/wish/367154461 7114160372 https://padlet.com/ang_joo_liak/03_dynamics/wish/367162105 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.]]> 2019-06-12 12:22:58 UTC https://padlet.com/ang_joo_liak/03_dynamics/wish/367162105 7114160372 https://padlet.com/ang_joo_liak/03_dynamics/wish/367525275 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]]> 2019-06-14 02:57:17 UTC https://padlet.com/ang_joo_liak/03_dynamics/wish/367525275 https://padlet.com/ang_joo_liak/03_dynamics/wish/368250922 Why is the net force on the kite equal and opposite to the original tension? Thank you!]]> 2019-06-19 06:34:27 UTC https://padlet.com/ang_joo_liak/03_dynamics/wish/368250922 https://padlet.com/ang_joo_liak/03_dynamics/wish/368263780 2019-06-19 07:58:01 UTC https://padlet.com/ang_joo_liak/03_dynamics/wish/368263780