Question

A ball is simultaneously given two velocities : One 10 m/s due east and other 20 m/s due North -west . Calculate the resultant velocity of the ball.
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Answer 1

Velocity is a vector quantity

V1= 10m/s

V2= 20m/s

Angle between both-- 90+45=135°

V=√[10^2 + 20^2 + 2(10)(20)Cos(135)]

V=√100 + 400 + 400(-0.707)

V=√(500-282.84) = √217.16

V=14.74 (Approx)