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Assuming the upward reaction of the ground on beam AB to be uniformly distributed and knowing that a = 0.3m
At a given instant in an airplane race, airplane A is flying horizontally in a straight line, and its speed is being increased at a rate of 6 m/s2
At an intersection car A is traveling south with a velocity of 25 mi/h when it is struck by car B traveling 30° north of east with a velocity of 30 mi/h
An overhead garage door of weight W consists of a uniform rectangular panel AC that is supported by two sets of frictionless rollers A and B
An uncontrolled automobile traveling at 100 km/h strikes squarely a highway crash cushion of the type shown in which the automobile is brought to rest
Arm ABD is connected by pins to a collar at B and to crank DE. Knowing that the velocity of collar B is 16 in./s upward, determine
As cam A rotates, follower wheel B rolls without slipping on the face of the cam. Knowing that the normal components of the acceleration of the points
An oscillating water sprinkler is operated at point A on an incline that forms an angle a with the horizontal.
As originally constructed, the center span of the George Washington Bridge consisted of a uniform roadway suspended from four cables.
As observed from a ship moving due east at 6 mi/h, the wind appears to blow from the south.
An aluminum casting has the shape shown. Knowing that the specific weight of aluminum is 0.100 lb/in3, determine the mass moment of inertia of the casting
An arch roof truss is loaded as shown. The length of all of the outer chords, AC, CE, ..., and OQ, is 1 m and the length of the webs AB, CD, EF, ..., and RQ
An automatic valve consists of a 225 * 225-mm square plate that is pivoted about a horizontal axis through A
An elevator starts from rest and moves upward, accelerating at a rate of 4 ft/s2 until it reaches a speed of 24 ft/s, which it then maintains
An electric wire having a mass per unit length of 0.6 kg/m is strung between two insulators at the same elevation that are 60 m apart
An automobile travels to the right at a constant speed of 80 km/h. If the diameter of the wheel is 560 mm, determine the velocities of points B, C, D, and E
An athlete is exercising while wearing a 5-lb ankle weight at A as shown
An oil pipeline is supported at 6-ft intervals by vertical hangers attached to the cable shown
An irregularly shaped machine component is held in the position shown by three clamps. Knowing that 940 FA = N, determine the magnitudes of the forces FB
An instrument package A is bolted to a shaker table as shown. The table moves vertically in simple harmonic motion at the same frequency as the variable-speed
An experimental space probe is launched from the earth and enters a highly eccentric elliptic orbit as it reaches point A.
After grading a lot, a builder places four stakes to designate the corners of the slab for a house
Activator rod AB exerts on crank BCD a force P directed along line AB. Knowing that P must have a 100-N component perpendicular to arm BC of the crank
An 80-lb disk of radius 10 in. spins as shown at the constant rate ?1 = 80 rad/s with respect to the bent axle ABC
An 8-kg plunger is released from rest in the position shown and is stopped by two nested springs; the constant of the outer spring is k1 = 3 kN/m