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  4. Two identical trains A and B are running from west to east and east to west at equator. They move with the same speed Statement 1: Pressure exerted by B on the ground will be larger than pressure exerted by A Statement 2: Both A and B move on circular tracks of radius equal to earth's radius

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Q. Two identical trains $A$ and $B$ are running from west to east and east to west at equator. They move with the same speed
Statement 1: Pressure exerted by $B$ on the ground will be larger than pressure exerted by $A$
Statement 2: Both $A$ and $B$ move on circular tracks of radius equal to earth's radius

System of Particles and Rotational Motion

Solution:

Statement-1 is true, Statement-2 is true but Statement- 2 is not a correct explanation for Statement-1. As the earth rotates from west to east, speed of $v_{A}$ w.r.t. earth's centre is greater than the speed of $v_{B}$. For circular motion of both bodies
$Mg-N=\frac{M v^{2}}{R}$
The body having greater speed, will have less $N$ and hence less pressure