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A driver involved in an accident claims he was going only 42 MPH. When police tested his car, they found that when his brakes were applied at 42 MPH, the car skidded 160 feet before coming to a stop. However, the driver's skid marks at the accident scene measured 210 feet. Assuming the same constant deceleration, determine the speed he was actually travelling just prior to the accident?
A student with a mass of 70 kg sits in a roller coaster that has a vertical loop of radius r=20 m. what is the Normal force exerted by the seat on the student at the bottom of the loop
A magnetic field of 3 Tesla is oriented into the page. A 10 cm long conducting bar is pulled to the right at a constant speed of 3.4 m/s. What is the magnitude of the current in the bar
A proton is accelerated from rest by a potential difference of 335 V. The proton enters a uniform magnetic field and follows a circular path of radius 25 cm. Determine the magnitude of the magnetic field. 1
A 10-kg box is at rest at the end of an unstretched springwith constant k=4000 N/m. What is the amplitude of the resulting oscillation of this system
A horizontal pipe of diameter 0.806 m has a smooth constriction to a section of diameter 0.4836 m. what is the rate at which oil is flowing
A 1200 kg car carrying four 84 kg people travels over a rough washboard dirt road with corrugations 4m apart which causes the car to bounce on its spring suspension.
During the spin cycle of your clothes washer, Find the angular displacement of the tub during a spin of 82.9 s
A woman can read the large print in a newspaper only when it is at a distance of 65 cm or more from her eyes. What should be the refractive power (in diopters) of her glasses
A horizontal 2.00-m long, 5.00-kg uniform beam that lies along the east-west direction is acted on by two forces. At the east end of the beam, What is the angular acceleration of the beam
Two conductors are joined by a long copper wire. Thus A) each conductor must be at the same potential. B) no free charge can be present on either conductor. C) each conductor carries the same free charge.
A 33.0cm focal length converging lens is 17.2cm behind a diverging lens. Parallel light strikes the diverging lens. What is the focal length of the diverging lens
A 1.00×104kg railroad car is rolling at 3.00m/swhen a 7000kg load of gravel is suddenly dropped in. What is the car's speed just after the gravel is loaded
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