# GENERAL KNOWLEDGE

## GK

### PHYSICS

 Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
A man is walking on a train opposite the trains forward motion. If the man is walking at 2 m/s and the train is moving at 10 m/s how fast is the man moving relative to the ground?
 A 12 m/s B 8 m/s C 10 m/s D 2 m/s
Explanation:

Detailed explanation-1: -(xi) Rectilinear motion: A motion described by a body along a straight line. (xii) A freely falling stone, a car moving on a straight road, a train moving on a straight rail track are the examples of rectilinear motion. (xiii) Curvilinear motion: Motion of a body in a curved line.

Detailed explanation-2: -CASE 4: Two moving bodies in opposite directions Time taken by the trains to cross each other after meeting = ( L1+ L2)/(S1+ S2 ). Here the total distance to be covered is the sum of the lengths of the trains and relative speed is the sum of the speeds (since they are moving in the opposite direction).

Detailed explanation-3: -A moving train has more speed than a walking man.

Detailed explanation-4: -(b) A man sitting in a train is in motion with respect to a man standing on the ground outside the train because the train is moving with respect to the observer on the ground. Was this answer helpful?

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