why have they squared the entire second part for the final KE? im also just generally confused about how they simplified all of the brackets etc
#further mechanics- momentum/KE
spice quartz
tall kindle
There’s no need
Just do initial - final
Then compare with the KE Ure given in the q
timid vapor
why have they squared the entire second part for the final KE? im also just gene...
the square is a typo in the mark scheme
as @tall kindle says, just work out the KEs as you would usually, using 1/2mv^2
not sure what happened there in the ms
