a body is simultaneously given two velocities 30 M per second due east and other 40 m per second due north find the resultant velocity
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This is testing the concept of perpendicular vectors.
On ours case the perpendicular vectors are in form of speed.
They form a right angled triangle with height 40m/s and length or rather base = 30m/s
The resultant velocity is the hypotenuse.
Hypotenuse is given by Pythagoras theorem.
H² = 40² + 30² = 2500
H = √2500 = 50
The resultant velocity is 50m/s
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