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In a rear-end collision the automobile that is accelerated to a velocity V in 0.01 s. What is the minimum velocity at which there is danger of neck fracture from whiplash? Utilize the fact the stretch rupture strength or maximum pressure that that a bone can with stand without fracture is 83 MPa, and suppose that the area of the cervical vertebra is 1 square centimetre and the mass of the head is 5 kg.
A swimmer heads directly across a river, swimming at 1.60 m/s relative to the water. She arrives at a point 58.0 m downstream from the point directly across river, 63 m wide. What is the speed of the river current.
Global warming is a cause for concern because even small changes in the Earth's temperature can have significant consequences. For example, if the Earth's polar ice caps were to melt entirely, the resulting additional water in the oceans would flo..
A computer to be used in a satellite must be able to withstand accelerations of up to 27 times the acceleration due to gravity. What is the minimum amplitude of vibration that must be used in this test
Your average speed on the first half of a car trip is 75.0 km/h. How fast do you have to drive on the second half of the trip to achieve an average speed of 83.0 km/h for the whole trip
a solid disk has a mass of 162 kg and a radiusof 1.3 m . the disk rotates about an axis through its center, how high could the block be lifted
a 3-kg rock is tied to the end of a string and twirled overhead 1.9 m above the ground in a 0.8-m radius horizontal
In the path shown below, the locations of a car driving around a track are shown at EQUAL time intervals where ?t = 20 s. The car starts with speed 40 m/s at x0 and uniformly slows down to 20 m/s from x0 to x2. The car then travels at a constant spee..
A fighter jet is launched from an aircraft carrier with the aid of its own engines and a steam-powered catapult. What is the work done on the jet by the catapult
A block of mass M is held motionless on a frictionless inclined plane by means of a string attached to a vertical wall as shown in the diagram.what is the magnitude of the tension t in string.
A string of length L vibrates at its fundamental frequency. What is the amplitude of each of the traveling waves that form this standing wave
You have a 193 Omega resistor, a 0.400 H inductor, a 4.92 uF capacitor, and a variable-frequency ac source with an amplitude of 2.91 V. What will be the current amplitude at this frequency
The electromagnetic wave that delivers acellular phone call to a car has a magnetic field with an rms valueof 1.5 x 10^ -10 T. How much energy does this wave carry through the window during a 45s phonecall
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