I thought it was a good paper!! Although I messed up on two, my mind blanked on the horizontal distance and the Stokes' law question, frustrating as they seem so simple now that I've thought about it!!
I got really lucky and realised how to work out the raindrop radius in the last 5 mins. It was something around 2.4x10-4m? Lol yeh rest of the paper was decent
I felt that it was better than last year, but there were some questions that were quite tricky... Overall, I think it was a good paper. What about you?[ Physics was easy, anyone who thinks otherwise should know that people with down syndrome should not be allowed to take the test.
For the 130J one, I initially could only get 144J was so confused! Then I played around and I think you needed to only use the point 6cm with the corresponding Force and use W=Fs rather than 1/2Fx, and this gives you 126.
I got really lucky and realised how to work out the raindrop radius in the last 5 mins. It was something around 2.4x10-4m? Lol yeh rest of the paper was decent
Exactly what I got :P!
I quickly realised it was the volume of a sphere = 4/3 x pi x r^3
for the 130j one, i initially could only get 144j was so confused! Then i played around and i think you needed to only use the point 6cm with the corresponding force and use w=fs rather than 1/2fx, and this gives you 126.
I felt that it was better than last year, but there were some questions that were quite tricky... Overall, I think it was a good paper. What about you?[ Physics was easy, anyone who thinks otherwise should know that people with down syndrome should not be allowed to take the test.
tbh im surprised even half of you can type
That's not fair my friend with Down syndrome took the test and he said it was alright
For the terminal velocity of the raindrop did anyone get 7.05 meters per second? And what did you guys say for the table tennis ball being submerged? I said upthrust greater than weight + drag so there was a resultant force causing the ball to accelerate upwards to the surface. should be fine?
For the terminal velocity of the raindrop did anyone get 7.05 meters per second? And what did you guys say for the table tennis ball being submerged? I said upthrust greater than weight + drag so there was a resultant force causing the ball to accelerate upwards to the surface. should be fine?
Yeah I got 7.05m/s too. And that's exactly what I said I just also states newtons second law just in case
For the terminal velocity of the raindrop did anyone get 7.05 meters per second? And what did you guys say for the table tennis ball being submerged? I said upthrust greater than weight + drag so there was a resultant force causing the ball to accelerate upwards to the surface. should be fine?
Yes I got 7.05ms^-1!! and I said that weight and drag were not sufficient to overcome upthrust and then the resultant force bit so basically same
But isn't the total compression 9cm? 3 and then a further 6
I thought so too, but I guess the child is only doing 6cm out of the 9cm (the stick doing the other 3) I struggle with the understanding too but that seemed like a close enough answer to 130 having played around with numbers
To those who got 144 i think you didnt think about the question too much, it said find out the work done by the child. You guys took into consideration of the spring being compressed a total of 9cm but initally the spring was already compressed 3cm so the only "work" the child is doing is 6cm worth.
Work done is F * D. Force was 2.1 x 10-3 distance was 6cm = 126 J