Thank You for your reply, Vela
umm...then, i have no other ideas other than using FORCE to solve this problem :PP which is :
F=-kx
Fx=F=-4*sin(3*pi*x)=-kx from this
we find k=4*sin(3*pi*x)/x
so Ep=kx^2/2=2*sin(3*pi*x)*x ?
is it right ? :P
Thanks
Homework Statement
mass "m" object is located near the origin of the coordinate system. External force was exerted on the object depending on the coordinate by the formula of Fx=-4*sin(3*pi*x). Find the short oscillation period, and the potential energy depending on the coordinate.
Homework...
sorry for asking a lot >.< but
translational motion is the motion of the object consisted of both straight and rolled part right ? (which means CM is in the air if we picture it ?)
and then where is the time coming ?
and thanks for all the advice :D
so... so it means i have to find the relation between rotating flag's potential and rotating energy, and wrapped off flag's potential energy ? and the mass is changing right...
also
one is what i can't find >.< ...
Homework Statement
The flag is d=2mm thick and D=30 m long. We roll the flag and stick the short side of the flag (long side is 30m, short side's length is not given) on the ceiling so that the flag unwraps back to the ground. Flag is M=30kg.
1. Find the time it takes to 10 m of the flag to get...