Answer to Question #63070 in Mechanics | Relativity for AUSTIN

Question #63070
1. an automobile travels 9 miles due south, then 20 miles in a direction 40 degrees south of east, determine the resultant displacement.
2.find the sum or resultant of the following displacements: A, 10 ft northwest, B, 20 ft 30 degrees north of east; C, 35 ft due south.
3.which of the vector r = xi+yj+zk makes with the positive directions of the coordinate axes.
4.An airplane pilot sets a course due north and his speed is 150km/hr. There is a wind 40km/hr from the east. What is the actual velocity of the airplane?
5. A river flows at a steady speed of 3m/s. A man wishes to cross in a motorboat which travels at 5km/hr so as to reach a point directly across the river. In what direction should he steer?
6. if r1 = 2i-j+k, r2 = i+3j-2k, r3 = -2i+j-3k and r4 = 3i+2j+5k, find the scalars a, b, c such that r4=ar1+br2+cr3
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Expert's answer
2016-11-02T10:54:07-0400
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