a girl applies 2500000 Pascal pressure on the ground and an elephant apply 100000 Pascal pressure on the ground who applies more pressure and how many times more
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Answers
Weight of elephant=40000N
Area of one foot = 1000 cm^2
=1000×10 ^−4m^2
Weight of girl=400N
Area of heel of girl = 1 cm ^2
=1×10 ^−4m^2
(a) Elephant has a larger weight of 40000N, therefore, elephant exerts a larger force on the ground. Elephant exerts a larger force on the ground by 40000N - 400 N = 39600 N.
(b) Weight of elephant = 40000N
Area of one foot = 1000 cm^2
=1000×10 ^−4m^2
Pressure= Area/Force
Pressure= 1000×10 ^−4
=)40000
=400000N/m^2
(c) Weight of the girl = 400N
Area of heel of girl =1 cm^2
=1×10^−4m^2
Pressure= Area/Force
Pressure= 1×10^−4
=)400
=)4000000N/m^2
(d) Girl exerts a larger pressure on the ground.
(e) Ratio =Pressure exerted by the elephant/
Pressure exerted by the girl
= 400000/4000000
= 1/10
The pressure exerted by girl is 10 times greater than that exerted by the elephant.