A ship sails north at √2 m s⁻¹. Current carries it east at 1 m s⁻¹, and a sailor climbs a vertical pole on the ship at 1 m s⁻¹. Find the sailor's velocity relative to ground.
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Question

A ship sails north at √2 m s⁻¹. Current carries it east at 1 m s⁻¹, and a sailor climbs a vertical pole on the ship at 1 m s⁻¹. Find the sailor's velocity relative to ground.

G1 Physics · Accepted Answer

Ground velocity is the vector sum of eastward current, northward ship velocity and upward climbing velocity: v=î+√2ĵ+k̂. Option B.