Find the angle made by the vector 4i+3j+5k on x axis

Explanation:

The magnitude of resultant vector in three dimension

If vector A = 4i + 3j + 5k

The calculated magnitude  | A | = = = 7

If the angle formed with x-axis by this vector is α

Then cosα = x-component of vector divided by its magnitude

or cosα = = 0.57

and angle α = 35° approx

it is called kinetic energy

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explanation:

physics means: "the branch of science concerned with the nature and properties of matter and energy. the subject matter of physics, distinguished from that of chemistry and biology, includes mechanics, heat, light and other radiation, sound, electricity, magnetism, and the structure of atoms."