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Tests reveal that a normal driver takes about 0.75 seconds before he or she can react to a situation to avoid a collision. It takes about 3 seconds for a driver on a cell phone to do the same. Both drivers are traveling on a straight road at 30 mph (44 ft/s) and their cars can decelerate at 2 ft/s2. Determine the shortest stopping distance d for each vehicle from the moment they see the pedestrians.
a piston-cylinder device contains 5 kg of r134a at 800 kpa and 60 c. the refrigerant is now cooled at constant pressure
Now our robotics team is trying to tighten one of the ¼" - 20 UNC bolts to hold on the wheels. They are using a wrench that is 6" long. They exert 10 lbs to pull the wheel toward its axle with 110 lbs of force. Fill in the values for this s..
air is compressed in an isentropic process from an initial pressure and temperature of p 1 90 kpa and t1 22 oc to a
a composite material is to be made of tungsten wire aligned in a single direction in a nickel matrix. the elastic
a material is sought for a high speed centrifuge. the objective is to acheive as high an angular velocity w of the
a steady incopressible two dimensional velocity field is shown below where u is the velocity component in x-direction
calculate the critical crack tip radius for a ceramic material that has a flexural strength of 638 mpa an elastic
based on observations the speed of a jogger can be approximated problems 617 by the relation v 5 7.51 2 0.04x0.3 where
consider a large furnace that can supply energy in the form of heat at 2000 r at a steady rate of 3000 btus. determine
estimate the amount of torque needed to actuate the knee near 0 deg flexion standing position based on the friction in
electrical heater wires are installed in a solid wall having a thickness of 8 cm and conductivity 2.5 wmk. the right
Evaluate the maximum height reached by the sphere, and the distance traveled by the block.
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