an elephant weighting 40000 N stands on one foot of area 1000cm^2 whereas a girl weighting 400 N stands on one heel of area 100 cm^2?
which of the two exerts large force on the ground?By how much ???
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Answer:
Elephant has larger weight of 40000N, so elephant exerts larger force on the ground. Elephant exerts a large force on the ground by 40000N - 400N = 39,600N
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With force and area we can calculate pressure.
Elephant = 40000 ÷ (1000÷10000)
= 400000 Pa
Girl = 400 ÷ (100 ÷ 10000)
= 40000 Pa
Therefore the elephant exerts a larger force than the girl. This is by 360000 Pa.
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