Need some help with VCAA's 2013 Sample exam (linked below):
http://www.vcaa.vic.edu.au/Documents/exams/physics/physics-specs-samp-w.pdf-For 6b, isn't the Impulse meant to calculated using the
resultant force, which is 17 N up (i.e. 17 N x 1.5s)? In Itute's solutions, the force of 22 N was used o.O
-For question 16a, shouldn't the graph of the induced EMF begin
under the x-axis from 0 to 1 seconds and be drawn
above the x-axis for 2 to 4 seconds? Well Itute, their solutions, have drawn it starting from
above the x-axis; who's wrong?
-And finally, for question 18, why is the
total resistance of the two wires 5 ohms? I thought the two wires would represent a parallel circuit so that the current splits up equally amongst them, so that the total resistance becomes 1.25 ohms (using: 1/R= (1/r + 1/r))
Thanks, would appreciate any help!