In: Civil Engineering
For a position vector d=(-7.1i+-0.1j)m, determine the x-component of the unit vector.
For a position vector d=(-7.1i+-0.1j)m, determine the y-component of the unit vector.
The direction of a 454.7 lb force is defined by the unit vector u1=cos(30°)i+sin(30°)j. Determine the x-component of the force vector.
Given,
Position vector, d = [ (-7.1) i + (-0.1) j ] m
The x and y components of unit vector in the same direction as that of given position vector can be determined as follows:
Hence,
x - component of unit vector = - 0.9999 m
y - component of unit vector = - 0.0141 m
Now, in the second part of question,
Given, magnitude of force = 454.7 lb
Unit vector of this force, u1= (cos 30)i + (sin 30)j
Then, the x - component of force vector can be determined as follows:
Hence, the x - component of force vector = 393.78 lb