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HSC Physics Marathon 2013-2015 Archive
Re: HSC Physics Marathon 2014 I've started a bit and I think I might know how to do part a- Area = 0.05^2 =0.0025 n=1 B=2 Since magnetic field is linear, cos90=1 Current=10A Therefore, torque=nBIAcosQ =10 X 0.0025 X 2 = 0.05 Nm torque I haven't yet done this in school, so I'm hoping its... -
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HSC Physics Marathon 2013-2015 Archive
Re: HSC Physics Marathon 2014 Zeref, that is because when you consider it from the perspective of delta y, you are considering the entire time (the time taken to reach ground) however, when you consider it from the perspective of delta x, you only consider the time taken for the ball to be... -
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HSC Physics Marathon 2013-2015 Archive
Re: HSC Physics Marathon 2014 Is this correct for the tennis question? Ux=45cos6.5 =44.71m/s Uy=45sin6.5 =5.094m/s Delta x =Ux.t 12.2 = 44.71 X t t=0.27286..... Delta y =Uy.t +1/2ay t^2 = 5.094 X 0.2728696 - 1/2 X 9.8 X 0.2728696^2 =1.02515....m Therefore, it does clear the net, because... -