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Shapes of Average and Marginal Cost Curves in the Short Run

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1. The are two incline plane AO and OB inclined at 45 degree and 60 degree with the horizontal as shown in figure . when a man moves on the inclined plane AO , he observed that the rain drops are falling 45 degree with the vertical , when the man moves on the incline plane OB, he observe that the raindrops are falling vertically downword with the horizontal . then find actual speed of the rain.

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Q. A man moving with a velocity of

5 m/s

on a horizontal road observes that raindrops fall at an angle of

45^{\circ}

with the vertical. When he moves with a velocity of

16 m/s

along an inclined plane, which is inclined at

30^{\circ}

with the horizontal, he observes raindrops falling vertically downward as shown in the figure. Find the actual velocity

{\to V}_{r}

of the raindrops.

Q. When a man moves down the inclined plane with a constant speed

5 m s^{- 1}

which makes an angle of

37^{o}

with the horizontal, he finds that the rain is falling vertically downward. When he moves up the same inclined plane with the same speed, he finds that the rain makes an angle

θ = t a n^{- 1} (\frac{7}{8})

with the horizontal. The speed of the rain is

Q. When a man moves down an inclined plane with a constant speed

5 m/s

which makes an angle of

37^{\circ}

with the horizontal, he finds that the rain is falling vertically downwards. When he moves up the same inclined plane with the same speed, he finds that the rain makes an angle

θ = {tan}^{- 1} (\frac{7}{8})

with the horizontal. The speed of the rain with respect to the ground is

Q. When a man moves down an inclined plane with a constant speed

5 m/s

which makes an angle of

37^{\circ}

with the horizontal, he finds that the rain is falling vertically downwards. When he moves up the same inclined plane with the same speed, he finds that the rain makes an angle

θ = {tan}^{- 1} (\frac{7}{8})

with the horizontal. The speed of the rain with respect to the ground is

Q. A person is walking on inclined plane with speed v. Rain is falling perpendicular to plane. Find v, so that raindrops appear to fall vertical.

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