A boat moves relative to water with a velocity which is 2.0 times than the river flow velocity. At what angle to the stream direction must the boat move to minimise drifting?

30⁰

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60⁰

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90⁰

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120⁰

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Solution

The correct option is D
120⁰

For the drift to be minimum, the angle to the stream direction the boat must move is,
$θ$ = $90^{\circ}$ + ${s i n}^{- 1}$ ( $\frac{v_{r}}{V_{B r}})$

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A boat moves relative to water with a velocity which is 2.0 times than the river flow velocity. At what angle to the stream direction must the boat move to minimise drifting?

The correct option is D 1200 For the drift to be minimum, the angle to the stream direction the boat must move is, θ = 90∘ + sin−1 (vrVBr)

The correct option is D
120⁰

For the drift to be minimum, the angle to the stream direction the boat must move is,
$θ$ = $90^{\circ}$ + ${s i n}^{- 1}$ ( $\frac{v_{r}}{V_{B r}})$