two parallel rail tracks run north - south . what is the relative velocity of B with respect to A in m/s?l
Answers
Answer:
I THINK YOUR QUESTION IS INCOMPLETE.
HERE Is ANOTHER QUESTION RELATED TO THIS . WITH ANSWER.
Two parallel rail tracks run north-south. Train A moves north with a speed of 54 kmh
−1
and train B moves south with a speed of 90 kmh
−1
, What is the
a. the relative velocity of B with respect to A?
b. the relative velocity of the ground with respect to B?
c. a velocity of a monkey running on the roof of the train A against its motion (with its velocity of 18 kmh−1 with respect to the train A) as observed by a man standing on the
ANSWER
a.
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.