A string is attached to the blade at one end, passes over a fixed pulley and is attached to a hanging block of mass M at the other end. Two cases are shown. In case "a," the block hangs vertically down and the string vibrates in the second harmonic. In case "b," a fan blows the block to the right by applying a constant horizontal force F and the string vibrates in the fundamental. Determine the magnitude of the force the fan must exert on the block in case "b." (Use any variable or symbol stated above along with the following as necessary: g.)
A string is attached to the blade at one end, passes over a fixed pulley and is attached to a hanging block of mass M at the other end. Two cases are shown. In case "a," the block hangs vertically down and the string vibrates in the second harmonic. In case "b," a fan blows the block to the right by applying a constant horizontal force F and the string vibrates in the fundamental. Determine the magnitude of the force the fan must exert on the block in case "b." (Use any variable or symbol stated above along with the following as necessary: g.)
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A string is attached to the blade at one end, passes over a fixed pulley and is attached to a hanging block of mass M at the other end. Two cases are shown. In case "a," the block hangs vertically down and the string vibrates in the second harmonic. In case "b," a fan blows the block to the right by applying a constant horizontal force F and the string vibrates in the fundamental. Determine the magnitude of the force the fan must exert on the block in case "b." (Use any variable or symbol stated above along with the following as necessary: g.)
Transcribed Image Text:The figure below shows a vibrating blade at the left which maintains a constant frequency.
M
a
Fー
M
b
A string is attached to the blade at one end, passes over a fixed pulley and is attached to a hanging block of mass M at the other end. Two cases are
shown. In case "a," the block hangs vertically down and the string vibrates in the second harmonic. In case "b," a fan blows the block to the right by
applying a constant horizontal force F and the string vibrates in the fundamental. Determine the magnitude of the force the fan must exert on the
block in case "b." (Use any variable or symbol stated above along with the following as necessary: g.)
F =
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