ce (atain Tn theanyst'sОтmereence, A, B, and C, we can write immediatelyEquation 2.16. If there are three different frames of refer-A). This is a handy= UP/C+and so on.EXAMPLE 2.12 Relative velocity on the highwayIn this example we will solve a relative motion problem involving only two frames of reference. Supposeyou are driving north on a straight two-lane road at a constant 88 km/h (Figure 2.30). A truck traveling at aconstant 104 km/h approaches you (in the other lane, fortunately). (a) What is the truck's velocity relativeto you? (b) What is your velocity with respect to the truck?UT/E = UT/YUT/YUP/ASOLUTIONSET UP Let you be Y, the truck be T, and the earth be E, and let thepositive direction be north (Figure 2.30). Then Uy/E= +88 km/h.=UC/BSOLVE Part (a): The truck is approaching you, so it must be mov-ing south, giving UT/E = -104 km/h. We want to find UT/y. ModifyingEquation 2.16, we have=+ UB/A,+ UY/E,UT/E- UY/E-104 km/h - 88 km/h = -192 km/h.comThe truck is moving at 192 km/h south relative to you.Part (b): From Equation 2.17,UY/T = -UT/Y = -(-192 km/h)−(−192You are moving 192 km/h north relative to the truck.Theory of relativitukm/h) = +192 km/h.9730 20REFLECT How do the relative velocities change after you and thetruck have passed? They don't change at all! The relative positions ofthe objects don't matter. The velocity of the truck relative to you is still-192 km/h, but it is now moving away from you instead of toward you.Practice Problem: Suppose you and the truck are both traveling in thenorthbound lane. (Let's assume the truck has recently passed you, soEUT/ESIINW-O-EÜYE1111Video Tutor SolutionuglA FIGURE 2.30 Velocities of you and the truck, relative to the ground.we don't need to worry about a collision.) If we continue to let north bethe positive direction, (a) what is the truck's velocity relative to you and(b) what is your velocity with respect to the truck? Answers:(a) +16 km/h, (b)-16 km/h.

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Description: ce (atain Tn theanyst'sОтmereence, A, B, and C, we can write immediatelyEquation 2.16. If there are three different frames of refer-A). This is a handy= UP/C+and so on.EXAMPLE 2.12 Relative velocity on the highwayIn this example we will solve a rela

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-192 km/h, but it is now moving away from we don't need to worry you about (a) what the positive direction, Practice Problem: Suppose you and the truck are both traveling in the (b) what is your velocity northbound lane. (Let's assume the truck has recently passed you, so (a) +16 km/h, (b) -16 km/h. lative to you is sun toward you. instead of a collision.) If we continue to let north be is the truck's relative to you and velocity with respect to the truck? Answers:

-192 km/h, but it is now moving away from we don't need to worry you about (a) what the positive direction, Practice Problem: Suppose you and the truck are both traveling in the (b) what is your velocity northbound lane. (Let's assume the truck has recently passed you, so (a) +16 km/h, (b) -16 km/h. lative to you is sun toward you. instead of a collision.) If we continue to let north be is the truck's relative to you and velocity with respect to the truck? Answers:

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter3: Two-dimensional Kinematics

Section: Chapter Questions

Problem 64PE: (a) Use the distance and velocity data in Figure 3.64 to find the rate of expansion as a function of...

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