A uniform thin rod of length and mass is rotating about an axis through its centre…

PHYSICS · Single correct · A Level · Physics · Engineering physics · Engineering physics

Problem

A uniform thin rod of length

1.2\,\text{m}

and mass

3.0\,\text{kg}

is rotating about an axis through its centre and perpendicular to its length with angular speed

25\,\text{rad\,s}^{-1}

. Calculate its rotational kinetic energy. (a)

1.69\times10^{2}\,\text{J}

(b)

1.13\times10^{2}\,\text{J}

(c)

5.6\times10^{1}\,\text{J}

(d)

2.25\times10^{2}\,\text{J}