A man moving in rain holds his unbrella inclined to the vertical even though the rain drops are falling vertically downwards . Why ?

A man travelling at 10.8 kmph in topless car on a rainy day. He holds an umbrella at angle of 37^(@) with the vertical so that he does not wet. If rain drops falls vertically downwards what is rain velocity.

A car which has front and rear glass screens almost vertical is moving on a road when rain drops' are falling vertically downward. The rain will strike:

A man starts running along a straight road with uniform velocity observes that the rain is falling vertically downward. If he doubles his speed, he finds that the rain is coming at an angle theta to the vertical. The velocity of rain with respect to the ground is :

When a boy is stationary, he observes that rain drops are falling at 30^(@) to vertical direction. When he starts running with speed 10m/s , he observed that rain drops are falling vertically downwards. Calculate the actual velocity of rain drops.

A glass wind screen whose inclination with the vertical can be changed is mounted on a car. The moves horizontally with a speed of 2m//s . At what angle alpha with the vertical should the wind screen placed so that the rain drops falling vertically downwards with velcoity 6m//s strike the wind screen perpendicularly?

A man sitting in a bus travelling in a direction from west to east with a speed of 40km//h observes that the rain-drops are falling vertically down. To the another man standing on ground the rain will appear

A man running along a straight road with uniform velocity vecu=uhati feels that the rain is falling vertically down along - hatj . If he doubles his speed, he finds that the rain is coming at an angle theta with the vertical. The velocity of the rain with respect to the ground is

When a man moves down the inclined plane with a constant speed 5 ms^-1 which makes an angle of 37^@ 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 theta = tan^-1 (7/8) with the horizontal. The speed of the rain is