while enjoying the end of our firstyear examinations, me and my coursemates all got this from our lecturer...

it's only this particular subject that we have a feedback! goshh


Feedback on the Mechanics 1B part of the exam:

Many students do not know that:
 r = r^(r) is the position vector in polar coordinates
 is conserved if d
dt = 0, where is any physical quantity such as momen-
tum, energy, or angular momentum.
 L0 = L where L is the proper length
 the de nition of proper time or proper length, and are unable to identify
them correctly in the given problems.
 forces are vector not scalars
 the oscillations about a potential minima is determined by the 2nd deriva-
tive of the potential.
 for a central force F = 􀀀
dU
dt ^r
 a driven damped harmonic oscillator has resonance at which the amplitude
of vibration is maximal.

Many students are confused about the dierence between a arbitrary central force
problem and the particular case of gravity. So, for example, many wrote incorrectly
that bound orbits are ellipses or drew the energy diagram for the gravitational po-
tential rather than for the given one.

No one knew how to properly construct the dierential equation describing the
spring loaded table.

you mean NO ONE KNEW? omg omg omg! that means i thought i knew it but i waswrong...!!! goodness

anyway, i can't believe someone so near us commited suicide due to exam stress! 2nd year chemist.. and he is a bright student! omg

i don't care.. it's all over and i'm going to have fun for at least2 weeks..!!

photos later...

*cant wait for a proper korean meal in London with HaeYeon tmr... yayyyyyyyyyyyyyy