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An aluminium rod is to withstand an applied force of 200 kN. To ensure a sufficient factor of safety, the maximum allowable stress on the rod is limited to 170 MPA. (170MN/m2) with a strain of 0.0025mm.mm-1.
The rod must be at least 3.8 m long but must deform elastically no more than 6 mm when the force is applied. Design an appropriate rod
A rock of mass m = 2 kg is tied to a string of length L = 1.9 m and is twirled in a vertical circle. The speed v of the rock is constant; that is, it is the same at the top and the bottom of circle.
A hydraulic cylinder with a radius of 0.0281 m has a piston on the left end and a safety valve at the right end. The safety valve is a circular opening with a radius of 0.00650m, sealed with a disk. The disk is held in place by a spring (spring co..
A spaceship negotiates a circular turn of radius 3035 km at a speed of 33360 km/h. What is the magnitude of the angular velocity
There are 50x10^6 homes in the US. Each home has one light bulb which runs one hour per day. all have 75watt light bulbs. How much energy per year do they use for lighting
question a straight cylindrical wire lying along the x axis has a length l and a diameter d. it is made of a material
A 14.0 kilogram block is dragged over a rough, horizontal surface by a 91.0 Newton force acting at 20.0 degree above the horizontal. Determine the work done on the block by normal force
They are each sitting on a beach ball that is just submerged beneath the water (see the figure). Ignoring the weight of the air in each ball, and the volumes of their legs that are under the water, find (a) the radius of father's ball and (b) the ..
A 12-kg hammer strikes a nail at a velocity of 8.5 m/s and comes to rest in a time interval of 8.0 ms. What is the average force acting on the nail
Two vehicles are approaching an intersection. One is a 2300kg pickup traveling at 14.0m/s from east to west (the ?x- direction), What is the magnitude of the net momentum
A 60 kg block is pushed 5m up a fricitonless incline to a height 1m above the ground. How much work is done by the person on the block pushing it up the incline
A coin is located 27.9 cm to the left of a converging lens (f = 20.0 cm). A second, identical lens is placed to the right of the first lens, Find the separation between the lenses
A 63-kg bungee jumper has fallen far enough that her bungee cord is beginning to stretch and resist her downward motion. Discover the force (magnitude and direction) exerted on her by the bungee cord at an instant when her downward acceleration has a..
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