Just Question C. Please show answers and steps neatly. xGEvaluate the following
ID: 1773949 • Letter: J
Question
Just Question C.
Please show answers and steps neatly.
xGEvaluate the following Week 2 PDF's of Lectur X D Microsoft PowerPoint-x/ D Lab2-IV pdf .> C | physics.oregonstate.edu/~coffinc/COURSES/ph211/Labs/Lab2-1V.pdf Microsoft PowerPoint x : Apps G Google Gmail-NAVER Dictionary N Netflix Y. -Oosu canvas 0SUosu portal 0SUMyUHDS @MTH DPH 211 @PH 211 @CHEM eChegg 4. Suppose you're a detective working on a burglery 38.7 case. Here's what you already know (and refer also(river) to the diagram): Sometime last night, robbers broke into a river- side bar and stole money. Night-surveillance cameras along the river banks show them stealing a boat as their getaway vehicle, crossing the river to try to fool the police. The vidco recordings indicate that the robbers took 1:04 ( min, 4 s) to travel across the river from point A to point B but that they aligned the boat always parallel to line segment A>X current bar Before being stolen, the boat had been moored at point A. It was cquipped only with a motor that runs at just one speed; and tests indicate that the motor will propel the boat through water at a steady 2.61 ms The riverbanks are both straight and parallel in this area. The robbers abandoned the boat at point B, at the base of a straight highway bridge that crosses the river at a 38.7° angle, as shown. The robbers had placed a getaway car at point B and had evidently driven back over the bridge: According to a radar gun positioned on the highway, a lone vehicle was recorded at this time of night, going past point C at a high speed (54.7 m/s). The known straight-line distances:dc309 m dac 256 m The radar gun that was focused on point C was not cquipped with a night camera, so you don't know the make or model of the high-spced car. To try to narrow this down, first you'd like to get a sense of the car's engine size: Assuming that it accelerated from rest at a steady rate all the way across the highway bridge from point B to point C, what was that acceleration magnitude? a. b. Assuming that the boat moved at a constant velocity during the getaway crossing, what was that velocity, as measured with respect to the shore? In case the robbers accidentally dropped anything overboard, you'd like to estimate how far to extend a search for clues downstream. To begin your estimation: Assuming the river current was uniform and steady for the entire crossing (and again, assuming the boat moved at constant velocity) how fast was the river current? c. 1:48 2017-10-10 *Explanation / Answer
Distance AB = dAB= 2.61x64= 167 m
Using sine law 167/sin38.7 = 309/sintheta
=>sin theta= 0.842
=>2.61/sin38.7= vr/0.842
=> vr = 3.51 m/s= speed of the river.
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