WHat the heck is with my car??

Classical Mechanics Level 2

A car is driving at 100mph in a straight line (possibly road). What is the speed of each of the wheel of the car at the point where they touch the ground??


The answer is 0.

Vaibhav Kandwal by Vaibhav Kandwal , 21, India

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2 solutions

Vaibhav Kandwal
Apr 1, 2015

When a wheel moves, it is moving in two ways, in rotational motion around the center and horizontally along the direction of travel. At point of contact with ground, both cancel each other and thus the answer 0 \boxed{0}

0 Helpful 1 Interesting 0 Brilliant 0 Confused
Peter Bradford
Sep 28, 2016

Perhaps more interesting is to ask which parts of the car are moving forward at 200mph! And: The tops of the wheels. Maybe you can use this fact to get out of a speeding ticket 😀

0 Helpful 0 Interesting 0 Brilliant 0 Confused

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