[1.247] - Problems in general Physics by I E Irodov: Solution by Saket Sir

Описание: [1.247] - Problems in general Physics by I E Irodov: Solution by Saket Sir

1.247. In the system shown in Fig. 1.57 the masses of the bodies
are known to be m1 and m2, the coefficient of friction between the body
mi and the horizontal plane is equal to k, and a pulley of mass m
is assumed to be a uniform disc. The thread does not slip over the
pulley. At the moment t = 0 the body m2 starts descending. Assum
ing the mass of the thread and the friction in the axle of the pulley
to be negligible, find the work performed by the friction forces acting
on the body m1 over the first t seconds after the beginning of motion.

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