Question

on two parallel railway tracks train A and train B are moving in opposite direction , if train A moves at 45 kmh and train B moves at 70kmh . Calculate the relative speed of (a) train B w.r.t A (b) train A w.r.t train B , (c) ground w.r.t A​

Answer 1

Answer:

   

v  

BA

​  

 

​  

 =  

v  

B

​  

 

​  

 -  

v  

A

​  

 

​  

 

Hence, velocity of train B w.r.t train A is 144 km/h toward south.

b. Velocity of ground w.r.t. B

v  

g,B

​  

=v  

g

​  

−v  

B

​  

 = 0 - 90$$

v  

g,B

​  

 = -90 km/h

Hence, velocity of ground w.r.t train B is 90 km/h towards north.

c.  

v  

m,g

​  

 

​  

 =  

v  

m,A

​  

 

​  

 +  

v  

Ag

​  

 

​  

 = 18 - 54 = -36 km/h

Hence, velocity of monkey will be 36 km/h toward north.

Explanation:

Answer 2

Answer:

-36 km/h id ghffufuifyddu vvkh