Question

Two cars A and B are moving in opposite directions with the speed of 10 m/s and 20 m/s
respectively. Find (i) VAB (ii) VBA
And also draw the diagram to represent the motion of the car.

Answer 1

Answer :-

Correct option is

A

448Hz

f  

1

​

=400Hz

V  

s

​

=340m/s

when both source and obsemer are moving  

towards each other

f  

2

​

=(  

V  

s

​

−V  

1

​

 

V  

s

​

+V  

2

​

 

​

)f  

1

​

 

=  

340−22

340+16.5

​

×400=  

318

356.5

​

×400

≅448Hz