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Can anybody pls solve these for me...: 9709/04/M/J/04 Q.4(ii) and Q.7(iii)......
please help.....i also asked before but nobody replied......
please help.....i also asked before but nobody replied......
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question 4 part (ii) find the angle of inclination by sin angle=0.7/2.5 so angle =16.3 now if you resolve the forces on the mass then normal contact force would be equal to 2cos16.3=1.92 now frictional force=1.92*0.15=0.288 workdone by frictional forces= 0.288*2.5=0.72 now KE=PE-WD=1.4-0.72=0.68JCan anybody pls solve these for me...: 9709/04/M/J/04 Q.4(ii) and Q.7(iii)......
please help.....i also asked before but nobody replied......
question 7 part (iii) at t=1.25s P2 and P1 are at the same height but P2 is moving downwards and P1 upwards so if you minus 1.25 from the total time P1 takes to reach its maximum height you will get the answer v=u+at so 0=30-10t ---->t=3s (at max height v=0) so time it is above P2 =3-1.25=1.75sCan anybody pls solve these for me...: 9709/04/M/J/04 Q.4(ii) and Q.7(iii)......
please help.....i also asked before but nobody replied......
WD=force*distance so work done against friction= frictional force * distance= 0.288*2.5 which is the lenght of the slope that the mass travels to come downbut why have u multiplied 0.288 with 2.5 for finnding the WD?
Thankuuu....question 7 part (iii) at t=1.25s P2 and P1 are at the same height but P2 is moving downwards and P1 upwards so if you minus 1.25 from the total time P1 takes to reach its maximum height you will get the answer v=u+at so 0=30-10t ---->t=3s (at max height v=0) so time it is above P2 =3-1.25=1.75s
but the formula of WD is F*d*(cosα)....so why we haven't taken dcosα ??WD=force*distance so work done against friction= frictional force * distance= 0.288*2.5 which is the lenght of the slope that the mass travels to come down
what? no where did the cosα came from? i don't get that? as far as i know there is no cosα in WD formula sorry i cant explain that much i am not too good at mechanicsbut the formula of WD is F*d*(cosα)....so why we haven't taken dcosα ??
ohhh okii...nyway Thanku soo muchwhat? no where did the cosα came from? i don't get that? as far as i know there is no cosα in WD formula sorry i cant explain that much i am not too good at mechanics
I also need it.....CAN SOME ONE PLZ TELL ME any site where i can get mechanics lectures .. plz ..
okay soplease explain the whole thing
hey dude m posting it...doubt in statistics may 2008 paper 6 Question no. 6. can anyone solve it?
can anyone help me in statistics Oct/nov 2008 paper 6 Q)3
plz help
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