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Byju's Answer

Standard XIII

Physics

Relative Motion: Rain Example

A flag is hoi...

Question

A flag is hoisted on the steamer boat.On the basis of the data given below find out the direction of flutter of

the flag

${\to v}_{s t e a m e r / w a t e r} = 10 \sqrt{3} m s^{- 1}$ towards North

${\to v}_{w a t e r} = 5 m s^{- 1}$ towards East

${\to v}_{w i n d} = 5 m s^{- 1}$ towards East

(Assume the wind does not affect the steamer)

North

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South

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East

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West

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Solution

The correct option is B
South

${\to v}_{s t e a m e r / w a t e r} = 10 \sqrt{3}^j m / s$

${\to v}_{w a t e r} = 5^i m / s$

${\to v}_{w i n d} = 5^i m / s$

$∴ {\to v}_{s t e a m e r} = {\to v}_{s t e a m e r / w a t e r} + {\to v}_{w a t e r}$

= $10 \sqrt{3}^j + 5^i m / s$

$∴ {\to v}_{f l a g}$ in the absence of wind is the velocity of flag w.r.t wind. This will be opposite to the velocity of the steamer.

$∴ {\to v}_{f l a g / w i n d} = - 10 \sqrt{3}^j - 5^i m / s$

${\to v}_{f l a g} = {\to v}_{f l a g / w i n d} + {\to v}_{w i n d}$

= $- 10 \sqrt{3}^j - 5^i + 5^i$

= $- 10 \sqrt{3}^j ∴$ direction - south

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Similar questions

A flag is hoisted on the steamer boat.On the basis of the data given below find out the direction of flutter of

the flag

${\to v}_{s t e a m e r / w a t e r} = 10 \sqrt{3} m s^{- 1}$ towards North

${\to v}_{w a t e r} = 5 m s^{- 1}$ towards East

${\to v}_{w i n d} = 5 m s^{- 1}$ towards East

(Assume the wind does not affect the steamer)

A flag is hoisted on the steamer boat.On the basis of the data given below find out the direction of flutter of

the flag

${\to v}_{s t e a m e r / w a t e r} = 10 \sqrt{3} m s^{- 1}$ towards North

${\to v}_{w a t e r} = 5 m s^{- 1}$ towards East

${\to v}_{w i n d} = 5 m s^{- 1}$ towards East

(Assume the wind does not affect the steamer)

Q. Question:

A flag is hoisted on the steamer boat.On the basis of the data given below find out the direction of flutter of

the flag

⃗vsteamer/water=10√3ms−1 towards North

⃗vwater=5ms−1 towards East

⃗vwind=5ms−1 towards East

(Assume the wind does not affect the steamer)
i saw the answer i didnt understand the following sentence
velocity of flag in the absence of wind is the velocity of flag wrt wind .this will be opposite to the velocity of the steamer

Q. A steamer is heading due North with

20 m s^{- 1}

. The wind is blowing

10 m s^{- 1}

due west. In which direction the flag on the mast flutters?

Q. A boat is moving towards east with velocity

4 m/s

with respect to river flowing towards north with velocity

2 m/s

and the wind is blowing towards north with velocity

6 m/s

. The direction of the flag blown over by the wind hoisted on the boat is

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A flag is hoisted on the steamer boat.On the basis of the data given below find out the direction of flutter of the flag →vsteamer/water=10√3ms−1 towards North →vwater=5ms−1 towards East →vwind=5ms−1 towards East (Assume the wind does not affect the steamer)