A small block of mass m = 0.50 kg is fired with an initial speed of v0 = 4.5 m/s along a horizontal section of frictionless track, as shown in the top portion of Figure P7.58. The mass then moves along the frictionless semicircular, vertical tracks of radius R = 1.6 m.
(a) Determine the magnitude of the force exerted by the track on the block at points A and B.
track force at A? N
track force at B ? N
(b) The bottom of the track consists of a section (L = 0.40 m) with friction. Determine the coefficient of kinetic friction between the block and that portion of the bottom track if the block just makes it to point C on the first trip. [Hint: If the block just makes it to point C, the force of contact exerted by the track on the block at that point should be zero.]
here the figure...
http://img.photobucket.com/albums/v372/smilytwinkle/p7_58.jpg
i really need help on this...it so complicated...please help..thanks
2007-10-27
15:57:45
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1 answers
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asked by
pinkepromise
2
in
Physics