First slide
Kinematics of rotational motion about fixed axis
Question

The wheels of an airplane are set into rotation just before landing so that the wheels do not slip on the ground. If the airplane is travelling in the east direction, what should be the direction of angular velocity vector of the wheels? 

Easy
Solution

The wheel should be rotated as shown. It is clockwise, so the direction of is inward or in north direction.

 

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