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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 ski gondola is connected to the top of a hill by a steel cable oflength 680 m and diameter 1.5 cm. As thegondola comes to the end of its run, What is the speed of the pulse
A metal bar with a resistance of 30 ohms is rotated around its center in a magnetic field of strength 0.5 T, what is the electrical power dissipated in the resistor
A child loses his balloon, which rises slowly into the sky. If the balloon is 23 cm in diameter as the child loses it, what is its diameter at the following altitudes? Assume that the balloon is very flexible and so surface tension could be neglec..
two blocks with masses m1 4.6kg and m2 3.8 kg are connected by a light spring on a horizontal frictionless table. at
A 302g ball is tied to a string. It is pulled to an angle of 6.00 degrees and released to swing as a pendulum. A student with a stopwatch finds that 17 oscillations take 12.0s. How long does the string.
a ball is thrown straight down from the top of a cliff with a speed of 5 ms. the cliff-top is 20 m above ground level.
a 950kg compact car is moving with the velocity v132x 17yms. it skids on an icy frictionless patch and collides with a
Because a concave lens cannot form a real image of a real object, it is difficult to measure its focal length precisely. What is the focal length of the concave lens
A man pushes an 80N crate a distance of 5m upward along africtionless slope that makes an angle 30o withthe horizontal. how much work is done by the man
An engine develops 490 N m of torque at 3750 rev/min. Find the power developed by the engine
You see condensed steam expelled from a ship's whistle 2.50 s before you hear the sound. how many meters are you from the ship
A proton with a mass of 1.67 x 10^-27 kg and charge on +1.6 x 10^-19 C, Find the time for the proton to make on complete circular orbit
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