Question

Wind is blowing at 20Root5 kmph
towards North-East.
Find the speed & direction of Car in cases
a. Driver feels it entering purely
from west.

b. Feels it is blowing purely toward
South East.

is a 25 Pointer so Answers shall be reported unless Sincere​

Answer 1

Answer:

Explanation:

Let V be the velocity of wind V  

m

​  

 be the velocity of man and V  

rel

​  

 be the velocity of wind w.r.t man:

V  

m

​  

=at,V  

r

​  

=  

V  

2

−V  

m

2

​  

 

​  

 

when V  

m

​  

=V  

r

​  

,  

V  

r

​  

 

​  

 will be along east.

at=  

V  

2

−a  

2

t  

2

 

​  

 

a  

2

t  

2

=V  

2

−a  

2

t  

2

 

V  

2

=2a  

2

t  

2

 

t=  

2

​  

a

V

​

Answer 2

Animals use Earth’s magnetic field for orientation:

Lost land animals may not be able to find their way home, but sea animals might. According to the U.S. Geological Survey (USGS), “there is evidence that some animals, like sea turtles and salmon, have the ability to sense the Earth’s magnetic field and to use this sense for navigation.”