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The Segway two-wheeled-self-balancing electric vehicle invented by Dean Kamen and used for short distance personnel transportation reportedly travels at 12.5 mph. The vehicle is controlled and powered with computers and electric motors. Lean forward, you move forward. Lean back and you go backward. Lean the handlebars to the left or right and you turn in that direction-see www.youtube.com for a video. When you need to brake, the motor acts as a dynamometer. Review the design of the Segway and address the question as to whether the Segway® conceptually is a "reasonable safe design" using the following categories:
(a) The usefulness and desirability of the product
(b) The availability of other and safer products to meet the same or similar needs
(c) The likelihood of injury and its probable seriousness
(d) The obviousness of the danger
(e) Common knowledge and normal public expectation of the danger (particularly for established products)
(f) The avoidability of injury by care in use of the product (including the effect of instructions and warnings)
(g) The ability to eliminate the danger without seriously impairing the usefulness of the product or making it unduly expensive
a coin placed 30.8 cm from the center of a rotating horizontal turntable slips when its speed is 51.2 cms.a what force
in cold weather condensation frequently occurs on the inner surfaces of the windows due to the lower air temperatures
A large rocket engine delivers hydrogen at 1500°C and 3 MPa to a nozzle with an exit pressure equal to the ambient pressure of 54 kPa. If the thrust of the rocket is 2 MN what is the exit velocity and mass flow rate of hydrogen? (use k = 1.41 and ..
find the cartesian components of force p acting in the x y and z directions given p20n alpha 134.5 deg beta 55.0 deg
a gas turbine is designed to produce 3000hp when using air at a maximum inlet temperature of 650k and assuming a heat
carbon monoxide and water vapor h2o are placed in a reaction vessel at 1000 k and 2.0 bars in a one two one molar
a gas that is contained in a cylinder undergoes two processes that are in series. the first process from 1 to 2 consist
(1) I shte cooling process polytropic? If so, what is the value of n? (2) Find the final state pressure. (3) Compute the work done for this process considering the water as a closed system.
determine the flow rate and direction in all pipes. If pA= 120 lbf/in2 gage, determine the pressures at points B, C, and D.
consider a plane wall 100mm thick and of thermal conductivity 100 w/m .k seady state conditions are known to exist with T1 = 400 k T2= 600 K. determine the heat flux and the temperature gradient off the coordinate systems.
water vapor enters a turbine at 6 mpa and 400degc and leaves the turbine at 100 kpa with the same specific entropy as
liquid water enters a 25-kw pump at 100-kpa pressure at a rate of 5 kgs. determine the highest pressure the liquid
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