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You are called as an expert witness in the trial of a traffic violation. The facts are these: A driver slammed on his brakes and came to a stop with fix acceleration. Measurements of his tires and the skid marks on the pavement indicate that he locked his car's wheels, the car traveled 184 ft before stopping, and the coefficient of kinetic friction between his tires and the road was 0.774. The charge is that he was speeding in a 45-mi/h zone. He pleads innocent.
Find what is your conclusion, innocent or guilty?
guilty
innocent
Find how fast was he going when he hit his brakes? mi/h
A physics TA pushes a 20.0-kg equipment cart at a constant velocity a distance of 24.0 m down the hall. determine the work done by the force of gravity acting on the cart
What is the Lens Equation? What do o, i and f stand for in the equation and what are the five parts of the Optical Bench used in this experiment? Briefly describe what each part does.
A platinum resistance thermometer has resistances of 220.0 when placed in a 0°C ice bath, What is the melting point of this substance
an electron moves along the z-axis with vz 4.4 x 107 ms. as it passes the origin what are the strength and direction
American football uses a field that is 100.0 yd long, whereas a soccer field is 100.0 m long. Which field is longer, and by how much
question two point charges are located on the x axis. the first is a charge q at x -a. the second is an unknown charge
Suppose a single electron orbits about a nucleus containing two protons (+2e), as would be the case for a helium atom from which one of the naturally occuring electrons is removed. obtain the magnitude of the electron's centripetal acceleration
question1a 14 g rifle bullet travelling 200 ms buries itself in a 3.5 kg pendulum hanging on a 3.3 m extended string
The electric potential at x = 3.0 m is 120 V, and the electric potential at x = 5.0 m is 190 V. What is the electric field in this region, assuming it's constant? -140 N/C 140 N/C -35 N/C 35 N/C 75 N/C.
turn in your answers to the following problems below.nbsp as always make sure to show all of your work.1. sound waves
If the ladder is just on the verge of slipping when the firefighter is 8.44 m up from the bot- tom, what is the coefficient of static friction between ladder and ground
Steel train rails are laid in 12.2m -long segments placed end to end. The rails are laid on a winter day when their temperature is -2.00 oC. what is the stress in them on a summer day when their temperature is 33.0 oC
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