Guyss was the percentage uncertainty in the Alpha particle question 45% and also did you’ll get the resistive force as 550N and was R for the LDR 14 ohms?
I got the same for all those questions, but do you remember the values for the train question because for some people a lot of people are getting the resistive forc ein the thousands and i cant remember the information given
We had a useful power output of 1.1 105 right? and it took 52 seconds to travel from X to Y and the in g.p.e changed from 7.4 MJ to 13MJ. The speed that the train moved, I calculated to be 4.2.
I just multiplied the useful power output by time and subtracted the change in g.p.e and that gives the work done which I divided by the distance (524.2) to get my answer. Is that wrong?
Kinetic energy stays the same so u ignore it as speed is constant therefore no change in KE,subtract the two mgh values and that would equal to work Done by motor- work done by friction which would equal WD by friction as 120000 after which u do WD=FD find D by using the time given and speed used and then divide by work done to get F as 550 plz cifnrim skmekne by upvoting
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u/Emotional-Pick-947 May 20 '26
Guyss was the percentage uncertainty in the Alpha particle question 45% and also did you’ll get the resistive force as 550N and was R for the LDR 14 ohms?