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A 2-Mg car has a velocity of v1 = 100 km/h when the driver sees an obstacle in front of the car. It takes 0.7s for him to react and lock the brakes, causing the car to skid. If the car stops when it has traveled a distance of 225m, determine the coefficient of kinetic friction between the tires and the road.
a pan of negligible mass is attached to two identical springs of stiffness k 250 nm. if a 10-kg box is dropped from a
r-134a is contained in a vertical cylinder fitted with a frictionless piston and a set of stops and the volume is
air enters an evaporative cooler at 1 atmosphere 36degc and 20 percent relative humidity at a rate of 4 m3min and it
an air-standard dual cycle has a compression ratio of 18 and a cutoff ratio of 1.1. the pressure ratio during
If the bar is subjected to centric forces of magnitude P = 30 kN and knowing that EA = 70 GPa and EB = 105 GPa, determine the normal stress (a) in the aluminum layers, (b) in the brass layer.
two dimensional steady state conduction occurs in a hollow cylindrical solid of thermal conductivity k 16wmk outer r -
a carefully controlled tensile test is conducted on a metal alloy specimen. the original diameter is 10 mm and the gage
if a undirectional composite part is designed to have a fiber volume fraction of 0.69 and uses liquid crystal polymer
a flashlight is powered for 30 minutes by a 9-v battery supplying power at 0.5 amps.a find the resistance of the
a carnot heat engine using 1 kg of air has the following conditions isothermal heat addition beginning at 15 mpa and
a 0.12-ounce bullet hits at 2000 fts a suspended 10-lb block of wood and becomed embedded in it. the angle alpha
some kg of ari is at an inital pressuuer aand temp of 1.73mnm2 and 175c it is expanded iso thermal to three volme and
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