Physics · May / June 2023 · Paper 42 · Question 3

p = F/A OR p ∝ 1/A

(force of gravity / weight of person is spread over a much) greater area

(force is same so) pressure is lower (so ice is less likely to crack)

5.8 × 103 Pa

p (due to water) = gh OR (p =) gh OR (p =) 1000 × 9.8 × 0.45 OR (p =) 4410

W = mg OR (W =) mg OR (W =) (690 × 9.8) OR (W =) 6762 OR (p (due to ice) =) 1352.4

(pressure =) candidate’s calculated pressure due to water + candidate’s calculated pressure due to ice

OR total pressure = [1000 × 9.8 × 0.45] + [(690 × 9.8) / 5.0]

OR total pressure = 4410 + 1352.4