- #1
B-80
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[SOLVED] Finding the angle in a vector
hey these are normally easy, but I keep getting this wrong
Here are three displacements, each in meters: d1 = 5.0 i + 5.0 j -6.0 k, d2 = -1.0 i -1.0 j + 3.0 k, and d3 = 4.0 i + 3.0 j + 2.0 k.
(a) What is r = d1 - d2 + d3?
Got it right, 10,9,-7
(b) What is the angle between r and the positive z axis?
I am getting 127.87 degrees, but its wrong
I am taking the vector r's j and k, or y and z axes. then I am just doing sqrt(9^2 + -7^2) and then cos-1(-7/11.4(which is the mag)) can anyone help this is due in like 35 mins
hey these are normally easy, but I keep getting this wrong
Here are three displacements, each in meters: d1 = 5.0 i + 5.0 j -6.0 k, d2 = -1.0 i -1.0 j + 3.0 k, and d3 = 4.0 i + 3.0 j + 2.0 k.
(a) What is r = d1 - d2 + d3?
Got it right, 10,9,-7
(b) What is the angle between r and the positive z axis?
I am getting 127.87 degrees, but its wrong
I am taking the vector r's j and k, or y and z axes. then I am just doing sqrt(9^2 + -7^2) and then cos-1(-7/11.4(which is the mag)) can anyone help this is due in like 35 mins