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A body is released from rest and moves under uniform gravity in a medium that exerts a resistance force proportional to the square of its speed and in which the body's terminal speed is V. Show that the time taken for the body to fall a distance h is(V/g) cosh-1 (egh/V2).In his famous (but probably apocryphal) experiment, Galileo dropped different objects from the top of the tower of Pisa and timed how long they took to reach the ground.
If Galileo had dropped two iron balls, of 5 mm and 5 cm radius respectively, from a height of 25 m, what would the descent times have been? Is it likely that this difference could have been detected?
[Use the quadratic law of resistance with C = 0.8. The density of iron is 7500 kg m-3.]
Determine the load F which the double strap butt joint shown in Figure can carry. The rivets are 6 mm in diameter with an ultimate shear strength of 325 MPa. A factor of safety of 8 is to apply.
Canada Widgets is looking at a S400 000 digital midget rigid widget gadget (CCA Class 8). It is expected to save S85 000 per year over its 10-year life, with no scrap value. C W s tax rate is 45%, and its after-tax ALARR is 15%. On the basis of an..
1.3 kg block b is moving with a velocity v0 of magnitude v02ms as it hits the 0.6-kg sphere a which is at rest and
solve the problem in the image. do it step wise in detail. this question is from book fracture mechanics - an
gas is sampled at atmospheric pressure from the exhaust manifold of an internal combustion engine and analyzed. the
As a 75 slug car travels along a horizontal, 3200 ft section of road, it changes speed from 5 mph to 60 mph. During this acceleration, the car gets an average MPG of 15 MPG. How efficient is the car’s engine during the acceleration assuming 1 gallon ..
Also, determine the temperaturedifference between the inner and outer surfaces of the bottom of the pan if it is 6 mmthick.
Application: Loop antenna. A transmitter uses a Hertzian dipole, 0.02A long. Because of changes in design, it becomes necessary to replace the Hertzian dipole by an equivalent loop antenna, keeping the current in the loop the same as the current i..
A pipe system carries a steam-water mixture at 250 psi, 95% quality. A leak develops in the pipe allowing the fluid to escape to the building which is at atmospheric pressure. Treating the leak as a throttling process, find the state of the escaping ..
what will be the final temperature in the tank? how much work will be accomplished over the course of the entire process?
However, in the thick sand layer directly below the clay layer the groundwater head is at a level of 4 m above the soil surface. Calculate the effective stress in the center of the clay layer.
A cylindrical specimen of a metal alloy 51.3 mm long and 11.1 mm in diameter is stressed in tension. A true stress of 350 MPa causes the specimen to plastically elongate to a length of 57.9 mm. If it is known that the strain-hardening exponent for th..
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