COLLEGE PHYSICS
2nd Edition
ISBN: 9781464196393
Author: Freedman
Publisher: MAC HIGHER
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Chapter 7, Problem 75QAP
To determine
How fast (in miles per hour) was car A traveling just before the collision if you have been called to testify as an expert witness in a trial involving a head-on collision?
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A car with mass mc=1270kg is traveling west through an intersection with a speed of vc=14.41m/s when a truck of mass mt=1740kg traveling south at vt=6.63m/s fails to yield. The vehicles collide, they stick together, and they slide on the asphalt which has a coefficient of kinetic friction of μk=0.500. Associate the positive x direction with east and the positive y direction with north.
a. Using the symbols provided in the palette below as opposed to their numeric equivalents, enter an expression, in Cartesian unit-vector notation, for the velocity of the vehicles immediately after the collision, as they begin to slide as a composite object.
b. How far, in meters, will the vehicles slide after the collision?
During the filming of a certain movie scene, the director wants a small car (whose mass is m1) traveling due east at speed v1 to collide with a small truck (whose mass is m2) traveling north. The director also wants the collision to be arranged so that just afterward, the interlocked vehicles travel straight toward the camera. If the line between the camera and collision makes an angle of theta with respect to north, at what speed v2 should the trucker drive?
A 1400 kg car moving at 21 m/s runs into a 1200 kg car mobing in the same direction at 14 m/s. The two Cars lock together, and both drivers inmediately apply their brakes. If the cars comes to rest in 18 m, what is the coefficient of friction between the car's tires and the road?
Chapter 7 Solutions
COLLEGE PHYSICS
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