Question

If the net gyroscope couple is negative then which of the following is true?

(a) The reaction will be vertically downwards on the outer wheels and vertically upwards on the inner wheels

(b) The reaction will be vertically upwards on the outer wheels and vertically downwards on the inner wheels

(c) The reaction will be vertically downwards on the outer wheels and vertically downwards on the inner wheels

(d) The reaction will be vertically upwards on the outer wheels and vertically upwards on the inner wheels

I have been asked this question in a dream while sleeping

This interesting question is from Stability of a Four Wheel drive Moving in a Curved Path topic in portion Gyroscopic Couple and Precessional Motion of Machine Dynamics

Answer 1

Correct answer is (a) The reaction will be vertically downwards on the outer wheels and vertically upwards on the inner wheels

Easiest explanation: A negative gyroscope couple would result in opposite direction of the reaction from the ground in the wheels of the vehicle.