MasteringPhysics CH08 HW-Micresoft Edge H HWProblem 8 27 Accident Analysis u8748
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Question
MasteringPhysics CH08 HW-Micresoft Edge H HWProblem 8 27 Accident Analysis u87486563 Problem 827: Accident Analysis. Part A Two cars colide at an intersection. Car A, with a mass of 1800 kg, is going from west to east, while car B, of mass 1500 kg, is going from nowth 1o south at 160 m/s. As a result of this collision, the two cars become enmeshed and move as one afterward. In your role as an expert witness, you inspect the scene and determine that, after the collision, the enmeshed cars moved at an angle of 65 0 south of east from the point of impact How fast were the enmeshed cars moving just after the colision? My Answers Give Up Part B How fast was car A going just before the colsion? m/s My Answers Give Up Lenovo VLC media Seluti ns player Type here to searchExplanation / Answer
Applying momentum conservation,
pi = pf
(1800 x vA i) + (1500 x -16j) = (1500 + 1800) v (cos65i - sin65 j)
along j direction,
- 1500 x 16 = - 3300 v sin65
v = 8.02 m/s ..............Ans(A )
(B) along i direction,
1800 vA = (1500 + 1800)(8.02 )cos65
vA = 6.22 m/s . .........Ans