Q. Two identical trains $P$ and $Q$ move with equal speeds on parallel tracks along the equator. $P$ moves from east to west and $Q$ from west to east
A) Data is sufficient to arrive at a conclusion
B) Both exert equal force on track
C) Train $Q$ exerts force on track
D) Train $P$ exerts greater force on track
Explanation
(d) Since, earth from west to east, so train $Q$ has effectively more angular velocity in comparison to train $P$ and hence, experiences a greater centrifugal force directed radially outwards. So, train $Q$ will exert a lesser force on track $Q$ in comparison to train $P$. Hence, $P$ exerts greater force on track
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.