PHYS 101 Lecture 24: Rotational Dynamics Example and Rotational Energy
20 Jul 2015
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Document Summary
Phys 101: physics for the life sciences lecture 24: + t2 r t1 +r t 2 =i pulley z r2 t 1 r2 t 2 = i pulley a r2 ( t 1 t 2 )= i pulley a r2 (m1a+m2 a m2 g)= i pulley a (isolate a) a= m2 g. Consider two particles moving in a circle but with different radii. The two particles have the same and the mass of the wire is negligible. Calculate the kinetic energy of the system of two particles. Two objects are rolling down a hill and they start from rest. Take as the system everything (objects, platform, earth and it"s gravity) No external forces are acting on the system and therefore the energy of the system does not change. Ethermal=0 there is friction but since the object is not sliding the system does not heat up. The two objects have the same radius and mass.
