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You have been called to testify as an expert witness in a trial involving an automobile accident. The speed limit on the highway where the accident occurred was 40 mph. The driver of the car slammed on his brakes, locking his wheels, and left skid marks as the car skidded to a halt. You measure the length of these skid marks to be 230ft , 8in. , and determine that the coefficient of kinetic friction between the wheels and the pavement at the time of the accident was 0.59.How fast was this car traveling (to the nearest number of mph) just before the driver hit his brakes?
plan a free-body diagram for the charge.
Polymer diffusion and Calibration of an optical tweezer
A car makes a round trip for 100m in 10 seconds. What is the average velocity?
An 86 Kg person stands on a uniform ladder 4m long, that weighs 70N. The floor is rough; hence, it exerts both a normal force, and a frictional force, on ladder. The wall, on the other hand, is frictionless; it exerts only the normal force. What a..
A 12.0 resistor, 10.0 mH inductor, and a 50.0 µF capacitor are connected in series to a 55.0 V (rms) source having variable frequency. Find out the energy delivered to the circuit during one period if the operating frequency is twice the resonance..
The police at the scene of the accident observed that the point of impact is 120 m from the base of the cliff. Explain how fast was the car traveling when it went over the cliff?
An infinitely long wire is formed as in the diagram on your assignment. It is formed so that it has a circular portion of R = 50cm and the straight portion is located at a distance r from the center of the circular portion. Determine r (in cm) suc..
How much acceleration does a 747 jumbo jet of mass 45000 kg experience in takeoff as the thrust for each of four engines is 45000 N.
What is decrease in kinetic energy throughout the collision.
If the index of refractions of the red light is 1.4925, what is the index of refraction of the blue light?
How many elections Paris would we have to remove before the electrostatic repulsion between the earth and moon would go over their gravitational attraction.
A person can jump a horizontal distance of 2.82m on Earth, where the free-fall acceleration, g = 9.81 m/s2. How far might the person jump on the moon, where the free-fall acceleration is g/6? How far could the person jump on Mars where the accelerati..
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