(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

mass of the mouse = 0.05 kg

disc's radius = 0.2m

disc's angular speed = 33 rev / min

assume that the angular speed ω doesn't change

2. Relevant equations

tangential speed = ω * r

3. The attempt at a solution

well, what i did was: drew the vectors, one was the tangential speed of the circle, another one was the radius which is the displacement of the mouse.

the vector connecting the ends of both these vectors is supposed to be the speed of the mouse

since tangential speed and radius are perpendicular, then with the Pythagoras's theorem the speed of the mouse is v^2 = vt^2 + r^2

then I calculated the work done by the change of energy

ΔE = [((1/2)mv^2)+ Iω^2] - Iω^2(since the omega doesn't change)

am I right, if not any suggestions. thanks

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# Homework Help: Mouse falls on rotating disc, find the work it needs to go to the center of it

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