(c) BS EN 1078 specifies the following for the testing of the helmet: a dummy head of mass 6.

(c) BS EN 1078 specifies the following for the testing of the helmet:a dummy head of mass 6.1 kg (specified in the related standard EN 960)in a test helmet is dropped onto a stationary anviltwo impact speeds are used, of 5.42 m s–1 and 4.57 m s–1the test requires that the deceleration experienced by the dummy headdoes not exceed 250 × g, where g is the acceleration due to gravity.(i) Show that the heights from which the helmet and dummy head should bedropped in the tests are equivalent to those stated in the note to Section4.4 of the Standard. Show your working, and state any assumptions thatyou make.(ii) Estimate the maximum force experienced by the head during an‘acceptable’ impact.