A suction cup works by virtue of a vacuum that is created within the cup. When t

Question

A suction cup works by virtue of a vacuum that is created within the cup. When the cup is pressed against a flat surface, most of the air is forced out, leaving a region of very low pressure. For a certain cup of area 1.4 cm^2 it is determined that the most massive object it will support on earth has a mass of 0.48 kg. What is the most massive object that the same suction cup will support on the moon where gravity is 1/4 that of earth and where there is zero atmospheric pressure?

a)1.92 kg
b)0.12 kg
c)336 kg
d)None
e)0.48 kg

Explanation / Answer

by applying force balance p*A=m*g now on moon there is zero atmospheric pressure therefore m=0 d)none

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