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An automobile initially moving 72. km/hr jams the brakes and skids to a stop in a distance of 24. meters on a dry pavement but stops in 81.6 m for a wet pavement (the auto weighs 2211. lbs; neglect reaction delay).
(a) What is the coefficient of friction for dry weather?
(b) What is the coefficient in wet weather conditions?
(c) Is this the STATIC or the KINETIC coefficient?
A gymnast of mass 69.0 kg hangs from a vertical rope attached to the ceiling. You can ignore the weight of the rope and assume that the rope does not stretch. Use the value 9.81 for the acceleration of gravity.
Neglect air resistance, as well as any energy absorbed by the pole, and clerify her altitude as she crosses the bar.
a 2.0 nc charge is placed on the x-axis at x=-3.0cm another 2.0nc charge is placed on the x-axis at x=3.0cm, What is the potential at the origin
Mars Rover When the Mars rover was deployed on the surface of Mars in July 1998, radio signals took about 14 {rm min} to travel from Earth to the rover. How far was Mars from Earth at that time.
Calculate the minimum required initial velocity for a home run, for baseballs hit at the angles 10 degree, 20 degree, 30 degrees, and 40 degrees from the horizontal
An oscillator consists of a block of mass 0.600 kg connected to a spring. Find the maximum force exerted on the block from the spring
An industrial flywheel with a moment of inertia of 445kg?m2 rotates with a speed of 6500rpm. How much work is required to bring the flywheel to rest
Two point charges 3.0cm apart have an electric potential energy -130J . The total charge is 15nC. What is the lesser charge
A female orb spider has a mass of 0.50g . She is suspended from a tree branch by a 1.1m length of 0.0020mm--diameter silk. how long does it take to reach the spider
A piece of glass has a temperature of 80.6 ° C. Liquid that has a temperature of 43.0 ° C is poured over the glass, determine the specific heat capacity of the liquid
When the Sun is directly overhead, a hawk dives toward the ground with a constant velocity of 4.75 m/s at 59.5° below the horizontal, Calculate the speed of her shadow on the level ground
A series RLC circuit has a peak current of 1.0 A with a frequency of 7 kHz. determine the average power of the circuit over one cycle
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