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JIPMER 2006

Exam: JIPMER
Year: 2006
Subject: Physics
Chapter: Laws of Motion

JIPMER 2006 · Physics · Laws of Motion

Which is true for rolling friction (μ_r) , static friction (μ_s)...

Which is true for rolling friction

\left(\mu_r\right)

, static friction \left(\mu_s\right)

and kinetic friction \left(\mu_k\right)

:

Options

A $\mu_s \gt \mu_k \gt \mu_r$
B $\mu_s \lt \mu_k \lt \mu_r$
C $\mu_s \lt \mu_k \gt \mu_r$
D $\mu_s \gt \mu_r \gt \mu_k$

Correct answer

A. $\mu_s \gt \mu_k \gt \mu_r$

Step-by-step solution

Static friction is always greater than kinetic friction, and rolling friction is less than kinetic friction, so

\mu_s \gt \mu_k \gt \mu_r

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