The 60-lb projectile shown has a radius of gyration of 2.4 in. about its axis of symmetry Gx and a radius of gyration of 10 in. about the transverse axis Gy. Its angular velocity ω can be resolved into two components: one component, directed along Gx, measures the rate of spin of the projectile, while the other component, directed along GD, measures its rate of precession. Knowing g that θ = 5° and that the angular momentum of the projectile about its mass center G is HG = (0.640 lb ‹… ft ‹… s)iˆ’ (0.018 lb ‹… ft ‹… s)j , determine 

(a) The rate of spin, 

(b) The rate of precession.

Transcribed Image Text:

B 11 in.