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An automobile has a mass of 1710 kg and a velocity of 17.2 m/s. It makes a rear-end collision with a stationary car whose mass is 2220 kg. The cars lock bumpers and skid off together with the wheels locked.
(a) What is the velocity of the two cars just after the collision?
(b) Find the impulse that acts on the skidding cars from just after the collision until they come to a halt.
(c) If the coefficient of kinetic friction between the wheels of the cars and the pavement is ?k = 0.420, determine how far the cars skid before coming to rest.
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explain how much charge is on each plate. What is the work done by the field on the electron.
An ore car of mass 4 000kg rolls downhill on tracks from a mine. At the end of the tracks, 10 m lower in elevation, is a spring with k = 400 000 N/m. How much is spring compressed in stopping the ore car? Ignore friction.
This bat hears its own sound plus the sound reflected by the wall. Explain how fast should the bat fly in order to hear a beat frequency of 10.0Hz?
A 44.5 mA current is carried by a uniformly wound air-core solenoid with 435 turns, a 20.0 mm diameter, and 14.5 cm length. Compute the magnetic flux through each turn
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Express the time in terms of given quantities. T catch = ? How far from Car B's starting line will the cars be when Car B passes Car A? Express your answer in terms of known quantities.
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