Assertion: Two similar trains are moving along the equatorial line with the same speed but in opposite direction. They will exert equal pressure on the rails. Reason: In uniform circular motion the magnitude of acceleration remains constant but the direction continuously changes.

Question

Assertion: Two similar trains are moving along the equatorial line with the same speed but in opposite direction. They will exert equal pressure on the rails. Reason: In uniform circular motion the magnitude of acceleration remains constant but the direction continuously changes. (A) If both Assertion and Reason are true and Reason is the correct explanation of Assertion (B) If the Assertion and Reason are true but Reason is not correct explanation of Assertion (C) If Assertion is true but, Reason is false (D) If Assertion is false but, Reason is true

Tardigrade Admin · Accepted Answer

Due to earth axial rotation, the speed of the trains relative to earth will be different and hence the centripetal forces on them will be different. Thus their effective weights m g-(m v2/r) and m g+(m v2/r) will be different. So they exert different pressure on the rails.

Q. Assertion : Two similar trains are moving along the equatorial line with the same speed but in opposite direction. They will exert equal pressure on the rails. Reason : In uniform circular motion the magnitude of acceleration remains constant but the direction continuously changes.

If both Assertion and Reason are true and Reason is the correct explanation of Assertion

If the Assertion and Reason are true but Reason is not correct explanation of Assertion

If Assertion is true but, Reason is false

If Assertion is false but, Reason is true

Due to earth axial rotation, the speed of the trains relative to earth will be different and hence the centripetal forces on them will be different. Thus their effective weights mg−rmv2​ and mg+rmv2​ will be different. So they exert different pressure on the rails.

Q. Assertion : Two similar trains are moving along the equatorial line with the same speed but in opposite direction. They will exert equal pressure on the rails.
Reason : In uniform circular motion the magnitude of acceleration remains constant but the direction continuously changes.