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9.4 Exercise 2

Avg difficulty 2.5

Suppose there had been no friction (the collision happened on ice); that would make μk\mu_{\text{k}} zero, and thus vc,f=2μkgd=0v_{\text{c},\text{f}} = \sqrt{2 \mu_{\text{k}} g d} = 0, which is obviously wrong. What is the mistake in this conclusion?

OpenStax University Physics Volume 1, 9.4 Types of Collisions, exercise 2

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Adapted from University Physics Volume 1 © 2016 Rice University. Licensed under CC BY 4.0. Source: University Physics Volume 1. Imported at revision db44eb9.