a) express the force that the person exerts on the ice, F, in terms of m and g.

Question

a) express the force that the person exerts on the ice, F, in terms of m and g. You do not need to include the force of the column of the air above her
b) calculate the numerical value of F in N
c) express the pressure on the ice from the person P in terms of F and A
d) calculate the numerical value of P in Pa
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Explanation / Answer

Part A:

Force exert by woman on ice will be

F = W

W = weight of woman

F = m*g

Part B

m = 51 kg

g = 9.81 m/sec^2

F = 51 kg*(9.81 m/sec^2)

F = 500.31 N

Part C

Pressure is given by:

P = Force/Area

So

P = m*g/A

Part D

A = 0.0039 m^2

P = 51*9.81/0.0039

P = 128284.62 N/m^2

1 N/m^2 = 1 Pa

P = 128284.62 Pa

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