Results for the seven balls tested are given in Figs. 2–4,
and further details are given in Table I. The force wave
forms are all of a similar general form, being an approximate
half-sine wave form, but asymmetrical in time. For most of
the balls, the maximum force is recorded at a time close to
0.5t, where t is the duration of the impact, indicating that the
experimental compression and expansion phases are of approximately
equal duration. However, the impulse during
Results for the seven balls tested are given in Figs. 2–4,and further details are given in Table I. The force waveforms are all of a similar general form, being an approximatehalf-sine wave form, but asymmetrical in time. For most ofthe balls, the maximum force is recorded at a time close to0.5t, where t is the duration of the impact, indicating that theexperimental compression and expansion phases are of approximatelyequal duration. However, the impulse during
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