A 0.453 kg bead can slide on a curved wire as seen in the figure. Assume h1 = 5.
ID: 2276118 • Letter: A
Question
A 0.453 kg bead can slide on a curved wire as seen in the figure.
Assume h1 = 5.82 m and h2 = 2.67 m. If the wire is frictionless and the bead is released with an initial speed of 1.73 m/s in the forward direction then find the speed of the bead at B.
If the wire is frictionless, find the speed of the bead at C.
i got 10.8 for the first answer please help
A 0.453 kg bead can slide on a curved wire as seen in the figure. Assume h1 = 5.82 m and h2 = 2.67 m. If the wire is frictionless and the bead is released with an initial speed of 1.73 m/s in the forward direction then find the speed of the bead at B. If the wire is frictionless, find the speed of the bead at C.Explanation / Answer
by work energy theorem
a)
0.5*m*u^2 + m*g*h1 = 0.5*m*v^2
v^2 = u^2 + 2*g*h
= 1.73^2 + 2*9.8*5.82
v = 10.8m/s
b)
0.5*m*u^2 + m*g*(h1-h2) = 0.5*m*v^2
v^2 = u^2 + 2*g*(h1-h2)
= 1.73^2 + 2*9.8*(5.82 - 2.67)
=8.04m/s
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