## Question

###### (a) A man weighing 779 N lies on a bed of nails. Find the average pressure...

(a) A man weighing 779 N lies on a bed of nails. Find the average pressure exerted by a nail on his skin if there are 1010 nails and the flattened point on each nail has a radius of 0.500 mm.

(b) Calculate the pressure exerted on the skin by an acupuncture needle of radius 0.100 mm applied with a force of 5.60 N

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