An elephant weighs 3000 N. Find the pressure exerted by the elephant on the ground if each of its feet measures 100 cm2 A box has sides 10 cm, 20 cm and 15 cm. If its weight is 5 N, find the pressure exerted by the box when it is placed on its (i) largest face and (ii) smallest face.

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An elephant weighing 40,000 N stands on one foot of area 1000 $c m^{2}$ whereas a girl weighing 400 N is standing on one 'stiletto' heel of area 1 $c m^{2}$ .

(a) Which of the two, elephant or girl, exerts a larger force on the ground and by how much ?
(b) What pressure is exerted on the ground by the elephant standing on one foot ?
(c) What pressure is exerted on the ground by the girl standing on one heel ?
(d) Which of the two exerts larger pressure on the ground : elephant or girl ?
(e) What is the ratio of pressure exerted by the girl to the pressure exerted by the elephant ?

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