Q.72

Expert-verifiedFound in: Page 230

Book edition
4th

Author(s)
Randall D. Knight

Pages
1240 pages

ISBN
9780133942651

A uniform solid bar with mass m and length L rotates with angular velocity v about an axle at one end of the bar. What is the bar’s kinetic energy?

The total kinetic energy of the bar is

The formula to find kinetic energy for the small element of bar is

here, is the kinetic energy of the small element of bar, is linear velocity, is mass element of the same.

Integrate the kinetic energy of each small element of the bar to find the total kinetic energy,

The formula to find the small mass is

Substitute

94% of StudySmarter users get better grades.

Sign up for free