Momentum transfer from oblique impacts

Details Momentum transfer from oblique impacts Momentum transfer from oblique impacts

May 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987pggp.rept..386s&link_type=abstract

In NASA, Washington, Reports of Planetary Geology and Geophysics Program, 1986 p 386-387 (SEE N87-23341 16-91)

Physics

Geophysics

Ballistic Trajectories, Impact Strength, Momentum Transfer, Obliqueness, Projectile Cratering, Angles (Geometry), Angular Momentum, Pendulums, Velocity

Scientific paper

A completely satisfactory experiment would be in a low gravity environment where the effect of momentum imparted by ejecta impacting the surface can be removed or controlled from momentum transfer during impact. Preliminary estimates can be made using a ballistic pendulum. Such experiments were initiated at the NASA-Ames Vertical Gun Range in order to examine momentum transfer due to impact vaporization for oblique impacts. The preliminary results indicate that momentum from oblique impacts is very inefficient: decreasing with increasing impact velocity and perhaps size; increasing with decreasing density; and increasing with increasing impact angle. At face value, such results minimize the effect of momentum transfer by grazing impact; the more probable impact angles of 30 deg would have a greater effect, contrary to the commonly held impression.

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