Problem 2 Civil Engineering students requires them to monitor the traffc safety at a busy intersection. They measwre (with a precision stopwatch) that exactly three seconds after car B passes through the intersection traveling south at ve = 55 mph, minivan A passes through at va = 70 mph on the road that runs at an angle 0 = 60° east of north. The speed of each automobile is constant. Determine (a) the relative velocity (in mph) of B with respect to 4, draw the vector triangles as part of vour answer (b) the change in position (in ft) of B with respect to A during a 10-s interval, (c) the distance (in ft) between the two automobiles 3 s after A has passed through the intersection.

Problem 2 Civil Engineering students requires them to monitor the traffc safety at a busy intersection. They measwre (with a precision stopwatch) that exactly three seconds after car B passes through the intersection traveling south at ve = 55 mph, minivan A passes through at va = 70 mph on the road that runs at an angle 0 = 60° east of north. The speed of each automobile is constant. Determine (a) the relative velocity (in mph) of B with respect to 4, draw the vector triangles as part of vour answer (b) the change in position (in ft) of B with respect to A during a 10-s interval, (c) the distance (in ft) between the two automobiles 3 s after A has passed through the intersection.

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Concept explainers

Relative Velocity

It is a measurement of an object with regards to the other object which is moving or stable or stationary. For example, if we are traveling in a bus and the bus is moving at speed of 50km/hr, then our speed is according to the nearby passenger on the bus is zero. According to them, we are not moving. But if one person standing on the ground or road observes us from outside of the bus, according to him we are moving at a speed of 50km/hr and the bus is also moving at a speed of 50km/hr. Now, the motion is recognized by the observer, it depends on a frame of reference or observer. This is motion called relative motion.

Question

Problem 2
Civil Engineering students requires them
to monitor the traffic safety at a busy intersection. They measure
(with a precision stopwatch) that exactly three seconds after car B
passes through the intersection traveling south at vg = 55 mph,
minivan A passes through at va = 70 mph on the road that runs at
an angle 0 = 60° east of north. The speed of each automobile is
constant.
VB
Determine
(a) the relative velocity (in mph) of B with respect to A,
draw the vector triangles as part of your answer
(b) the change in position (in fi) of B with respect to A during a 10-s interval,
(c) the distance (in ft) between the two automobiles 3 s after A has passed through the
intersection.
z +

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