Two railway tracks are parallel to the North-South direction. Train A is moving with a speed of 40ms-1from North to South, along one track, while Train B is moving with a speed of 30ms-1 from South to North.
Calculate (i)Relative velocity of A with respect to B, and (ii) Relative velocity of ground with respect to A.
Answers
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$$
v
g,B
= -90 km/h
Hence, velocity of ground w.r.t train B is 90 km/h towards north.
c.
v
m,g
=
v
m,A
+
v
Ag
= 18 - 54 = -36 km/h
Hence, velocity of monkey will be 36 km/h toward north.
Explanation:
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Answer:
Two parallel rail tracks run north-south. Train A moves north with a speed of 54 kmh
−1
and train B moves south with a speed of 90 kmh
−1
, What is the
a. the relative velocity of B with respect to A?
b. the relative velocity of the ground with respect to B?
c. a velocity of a monkey running on the roof of the train A against its motion (with its velocity of 18 kmh−1 with respect to the train A) as observed by a man standing on the
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ANSWER
a.
v
BA
=
v
B
-
v
A
Hence, velocity of train B w.r.t train A is 144 km/h toward south.
b. Velocity of ground w.r.t. B
v
g,B
=v
g
−v
B
= 0 - 90$$
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.