Question

Review You may want to review (Pages 321-323) What is the magnitude of the angular momentum of the 2.80 kg, 4.70-cm-diameter rotating disk in the figure (Figure 1)? kg m2s Submit Figure 1 of 1 Part B What is its direction? xdirection -x direction ydirection y direction zdirection -z direction

Answer 1

Solution)

Given,

Diameter = 4.7 cm

Radius,  R= 2.35 cm = 0.0235 m

Mass, m=2.8 kg

Now,

Angular speed,  ω = 600 rpm= 600 (2π/60) rad/s = 20π rad/s

So,

Angular momentum = Iω = (mR^2/2)(20π) = 0.0485 kg-m/s

=============

Part b)

Direction = negative x direction since it is clockwise about positive x axis.

================