Showing 2171 to 2180 of 2573 Questions
  • The 50-kg uniform pole is on the verge of slipping at A when θ = 45o. Determine the coefficient of static friction atA.

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    132
  • A force of P = 20 lb is applied perpendicular to the handle of the gooseneck wrecking bar as shown. If the coefficient of static friction between the bar and the wood is μs = 0.5, determine the normal force of the tines at A on the upper board. Assume the surface at C issmooth.

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    344
  • The thin rod has a weight W and rests against the floor and wall for which the coefficients of static friction are μA and μB, respectively. Determine the smallest value of θ for which the rod will notmove.

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    279
  • A roll of paper has a uniform weight of 0.75 lb and is suspended from the wire hanger so that it rests against the wall. If the hanger has a negligible weight and the bearing at O can be considered frictionless, determine the force P needed to start turning the roll if θ = 30o. The coefficient of static friction between the wall and the

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    0
  • A roll of paper has a uniform weight of 0.75 lb and is suspended from the wire hanger so that it rests against the wall. If the hanger has a negligible weight and the bearing at O can be considered frictionless, determine the minimum force P and the associated angle needed to start turning the roll. The coefficient of static friction betw

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    197
  • If the coefficient of static friction between the chain and the inclined plane is μs = tan θ, determine the overhang length b so that the chain is on the verge of slipping up the plane. The chain weighs w per unitlength.

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    90
  • Determine the maximum height h in meters to which the girl can walk up the slide without supporting herself by the rails or by her left leg. The coefficient of static friction between the girl’s shoes and the slide is μs =0.8.

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    107
  • If the coefficient of static friction at B is μs = 0.3, determine the largest angle and the minimum coefficient of static friction at A so that the roller remains self-locking, regardless of the magnitude of force P applied to the belt. Neglect the weight of the roller and neglect friction between the belt and the verticalsurface.

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    126
  • If θ = 30o, determine the minimum coefficient of static friction at A and B so that the roller remains self-locking, regardless of the magnitude of force P applied to the belt. Neglect the weight of the roller and neglect friction between the belt and the verticalsurface.

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    95
  • The clamp is used to tighten the connection between two concrete drain pipes. Determine the least coefficient of static friction at A or B so that the clamp does not slip regardless of the force in the shaftCD.

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    94