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  • A train is moving with 50 km/h and a man is running with 20 km/h in a direction opposite to the dir

A train is moving with 50 km/h and a man is running with 20 km/h in a direction opposite to the direction of train. Then relative velocity of train (in km/h ) with respect to man is

Option: 1

70


Option: 2

30


Option: 3

60


Option: 4

40


Answers (1)

best_answer

As we learned

Case of Relative velocity -

When A & B are moving along with straight line in opposite direction.

\vec{V}_{A}= Velocity of object A.

\vec{V}_{B}= Velocity of object B.

Relative velocity of A with respect to B is.

\vec{V}_{AB}=\vec{V}_{A}-(-\vec{V}_{B})

-\vec{V}_{B}  is because of opposite direction.

\vec{V}_{AB}=\vec{V}_{A}+(\vec{V}_{B})

 

As per question

 \underset{V_{R}}{\rightarrow}  = V_{T}+V_{M}

= ( 50 + 20 ) km/h

=  70  km/h

 

Posted by

Kuldeep Maurya

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