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3.2 , motion in plane — Physics STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 SciencePhysics3.2 , motion in plane1 Mark
MCQ
A man sitting in a bus travelling in a direction from west to east with a speed of $40 \,km/h $observes that the rain-drops are falling vertically down. To the another man standing on ground the rain will appear
  • A
    To fall vertically down
  • ✓
    To fall at an angle going from west to east
  • C
    To fall at an angle going from east to west
  • D
    The information given is insufficient to decide the direction of rain.
✓

Answer

Correct option: B.
To fall at an angle going from west to east
b
(b) A man is sitting in a bus and travelling from west to east, and the rain drops are appears falling vertically down.

${v_m} = $ velocity of man

${v_r} = $ Actual velocity of rain which is falling at an angle $\theta $ with vertical

${v_{rm}} = $ velocity of rain w.r.t. to moving man

If the another man observe the rain then he will find that actually rain falling with velocity ${v_r}$ at an angle going from west to east.

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