Home
Class 11
PHYSICS
A glass wind screen whose inclination wi...

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

A

`tan^(-1)(1//3)`

B

`tan^(-1)(3)`

C

`cos^(-1)(3)`

D

`sin^(-1)(1//3)`

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • KINEMATICS 1

    DC PANDEY|Exercise MCQ_TYPE|27 Videos

  • KINEMATICS 1

    DC PANDEY|Exercise COMPREHENSION_TYPE|19 Videos

  • KINEMATICS

    DC PANDEY|Exercise INTEGER_TYPE|11 Videos

  • LAWS OF MOTION

    DC PANDEY|Exercise Medical entrances gallery|39 Videos

Similar Questions

Explore conceptually related problems

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 glass wind screen whose inclination with the vertical can be changed, is mounted on a car as shwon in figure. The cart moves uniformly along the horizontal path with a speed of 6m//s . At what maximum angle a to the vertical can be wind scrren be placed so that the rain drops falling vertically downwards with velcoity 2m//s , do not enter the cart?

·A pipe which can be swivelled in a vertical plane is mounted on a cart (see Fig. lE.122). The cart moves uniformly along a horizontal path with speed v_(1)=2m//s . At what angle a to the horizon should the pipe be placed so that drops of rain falling plumb with a velocity v_(2)=6m//s move parallel to the walls of the pipe without touching them? Consider the velocity of the drope as constant due to the resitance of air.

A boy is running on a horizontal road with a velocity of 5 m/s. At what angle should he hold his umbrella in order to protect him self from the rain if the rain is falling vertically with a velocity of 10 m/s?

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 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 is moving on horizontal ground with a velocity vm s^(-1) with respect to earth. The driver of the car observes the rain to be falling vertically downwards with velocity 2vm s^(-1) . What is the velocity of the rain with respect to the driver ?

Wind is blowing in the north direction at speed of 2 m/s which causes the rain to fall at some angle with the vertical. With what velocity should acyclist drive so that the rain appears vertical to him: