A person is rowing across the river with a velocity of 4.5 km/hr northward. The river is flowing eastward at 3.5 km/hr (Figure 4). What is the magnitude of her velocity (v) with respect to the shore?
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Given : A person is rowing across the river with a velocity of 4.5 km/hr northward. The river is flowing eastward at 3.5 km/hr
To find : magnitude of her velocity (v) with respect to the shore
Solution:
Northward velocity = 4.5 km /hr
East ward Velocity = 3.5 km/hr
Ne velocity = √(4.5)² + (3.5)²
= √20.25 + 12.25
= √32.5
= 5.7
magnitude of her velocity (v) with respect to the shore = 5.7 km/hr
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