Thursday, December 11, 2008

Βοys Withοut Underwear

Physics of household: Act Three


Even the vacuum cleaner!

Consider the vacuum still at rest, the masses as to draw two overlapping (see figure): the lower mass M / 2, the upper mass M / 3 (where M is the value determined the first time that
M = F / (g ^ 2/2h + v0) (kg) )

Imagine that the two masses are glued and the vertical force of cohesion between the two is equal to the gravitational force of mass M / 2. Assuming that the suction force acting only on the higher mass (as long ago as a screen to the bottom), which of the following statements is correct (the statement used must be fully justified calculation and / or considerations):
i. The two masses are sucked simultaneously;
ii. The two masses are aspirated;
iii. The two masses are aspirated separately at different times;
iv. Is drawn only above the ground;
v. None of the above.

Reconsidering the choice even if the masses are stacked in reverse order: in the M / M 3 and above / 2, subject to the force of cohesion.
Try! the graftifiche are enticing:
(+ + + for significant contributions)
(++++ for important contributions)
(++++++++ for the full solution)