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The component vector sum is zero and the all components cancel out.:)
No. The right hand side is always greater - unless both components are zero.
That all depends on the angles between the vector and the components. The only things you can say for sure are: -- none of the components can be greater than the size of the vector -- the sum of the squares of the components is equal to the square of the size of the vector
Velocity is a vector, you can sum velocity in terms of direction components such as x and y.
If the sum of the squares of the vector's components is ' 1 ',then the vector's magnitude is ' 1 '.