The figure shows a football in three common inflight configurations. Case (a) is a perfectly thrown spiral

Question:

The figure shows a football in three common inflight configurations. 

Case (a) is a perfectly thrown spiral pass with a spin rate of 120 rev/min. 

Case (b) is a wobbly spiral pass again with a spin rate of 120 rev/min about its own axis, but with the axis wobbling through a total angle of 20°. 

Case (c) is an end-over-end place kick with a rotational rate of 120 rev/min. 

For each case, specify the values of p, θ, β, and ψ˙ as defined in this article. The moment of inertia about the long axis of the ball is 0.3 of that about the transverse axis of symmetry.

Fantastic news! We've Found the answer you've been seeking!

Step by Step Answer:

Related Book For  book-img-for-question

Engineering Mechanics Dynamics

ISBN: 9781118885840

8th Edition

Authors: James L. Meriam, L. G. Kraige, J. N. Bolton

Question Posted: