@Bill Foster
oh now i get it, so i have to use of the SUVAT equations to find the time, am i right? (^^)
@azatkgz
i think i had a mistake to take the time as 1s. and also, wouldn't i be taking the initial velocity (u) as 0 ms(-1) because the starting velocity is 0??.
and also, did i...
its weird, because the answer i got from my teacher was that the total momentum was unchanged while the total kinetic energy had increased.
i can see how the total kinetic energy increased, but why does the total momentum remain unchanged? or is my teacher actually saying the wrong answer :(...
Q1
A kangaroo was seen to jump to a vertical height of 2.8m. for how long was it in the air?
Attempt on the solution
not possible? what do you guys think?
Q2
A ball was photographed stroboscopically as it was released and fell freely. eight images appear on the phto which is...
hi guys!~ i was going through my test papers and found a question that i don't understand >_<
when a rocket is shot upwards and at the point where it stops in the air, it explodes...
so why does its momentum remain unchanged but the kinetic energy is increased??
~by the way, the answer...