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A police officer is investigating a crash between two identical cars of mass m = 1500 kg. After the crash, the cars have stuck together and left skid marks for a distance of d = 10 m before coming to a stop. The officer determines that the coeffient of kinetic friction between the cars and road is ?k = 0.8. When interviewing the drivers, the officer finds out that one car was stationary and the other was moving before the collision. The officer gives the driver of the moving car a speeding ticket. What is the speed that the officer writes on the ticket?
A rectangle coil of 55 turns, dimensions of 0.100m by 0.200m and a total resistance of 10.0 ohms rotates with angular speed 33.0 rad/s about the y axis in a region, Calculate the maximum induced emf in the coil
A 6.4g lead bullet traveling at 460m/s is stopped by a large tree. If half the kinetic energy of the bullet is transformed into internal energy and remains with the bullet while the other half is transmitted to the tree, what is the increase in te..
A 50.0-g object is attached to a horizontal spring, What is the velocity of the object when it is halfway to the equilibrium position if the surface is frictionless
You are designing a precision mercury thermometer based on the thermal expansion of mercury, Determine the initial volume of mercury that allows this change, Find the radius of a spherical bulb that contains this volume of mercury
You have a string with a mass of 14.1 g. You stretch the string with a force of 8.63 N, giving it a length of 1.93 m. What is the wavelength of the standing wave you create in the string
A fan at a rock concert is 35m from the stage, where sound intensity level is 125 dB. Her eardrums have a diameter of 8.07mm. How much energy is transferred to each eardrum in one second? (Distance from the speaker to the edge of the stage is 1 m...
During 0.15 s, a wheel rotates through an angle of 2.74 rad as a point on the periphery of the wheel moves with a constant speed of 2.16 m/s
A mass of 0.4 kg, is connected to a spring with a spring constant of 100 N/m, What is the maximum speed of the mass and What is the energy stored in the mass/spring system when its speed is half the maximum value
Suppose a capacitor in a video camera has a capacitance of 26.0 ?F, How much potential energy is stored in the capacitor
A rod moving in the positive x direction is measured by a stationary observer to have a length of 10.0meters, Find the speed of the second observer as measured by the stationary observe
A car m = 2500 kg is traveling at a constant speed of v = 33 m/s. The car experiences a drag force (air resistance) of Fd = 250 N. What is the power in horsepower
A cubic box of volume = 0.34300m^3 is filled with air at atmospheric pressure at 20.000*C. What is the net force on one side of the box
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