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You testify as an expert witness in a case involving an accident in which a car slides into a car that was stopped at a red light along a road headed down a hill. You find that the slope of the hill is è = 12 degree, that the cars were separated by a distance of 24.0 meter when the approaching car starts to slide, and that the speed of the car was 18.0 m/s when it started to slide. Your job is to find the speed of the car when it hits the car stopped at the light. Suppose the coefficient of kinetic friction between the tires and the road is 0.50.
a point charge causes an electric flux of -560 nmiddotm2c to pass through a spherical gaussian surface of 14.0 cm
What is the coefficient of kinetic friction between the table and floor.
a river has a 5m/s current due east. With respect to the water, the boats velocity is 12m/s at 60 degress north of east. What is the velocity of the boat relative to the earth
A 2g marble is fired vertically upward using a springgun. what is the spring constant
The yellow light from a helium discharge tube has a wavelength of 587.50. When this light illuminates a certain diffraction grating it produces a first-order principal maximum at an angle of 1.050.
a rocket with inital mass 1000 kg adjusts its thrust byvarying the rate at which mass is ejected. the ejection speedrelative to the rocket is 30 km/s. find at what rateis mass being ejected at that instant
how long would it take a car to return to its starting place if it traveled 180 ms average speed of 90 kmhr and
The 40 kg man in the roller coaster car is sitting on a bathroom scale. If he is travelling at 35.3 m/s at the point shown and the radius of vertical coaster track is 53 meters, to the nearest newton what does the scale read?
two polarizers are oriented at 72 degress to one another. Unpolarized light falls on them. What fraction of the light intensity is transmitted
A student investigating circular motion places a dime 10 cm from the center of a 33 &1/3-rpm record on a turntable. The record player can accelerate at 1.42 rad/s^2. Why does the dime slide outward
The gravitational force between two electrons that are 0.97 m apart is 5.76 multiplied by 10-71 N. Find out the mass of an electron. (Use G = 6.67 10-11 N · m2/kg2.)
A ball is thrown straight upwith an initial velocity v0=4.9 m/s. Assume that the acceleration due to gravity is g=9.8 m/s^2 downward. How long does it take to come back to its inital position
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