A person wearing the shoes has a mass of 60 kg . Part A Estimate the pressure ex

ID: 1791998 • Letter: A

Question

A person wearing the shoes has a mass of 60 kg .

Part A

Estimate the pressure exerted on a floor by one pointed heel of area 0.45 cm2.

Express your answer to two significant figures and include the appropriate units.

Part B

Estimate the pressure exerted on a floor by one wide heel of area 16 cm2.

Express your answer to two significant figures and include the appropriate units.

What am I doing wrong??

PART A: These answers are incorrect!

ANSWER 1: Deduction: -3%

1.31107Nm2

ANSWER 2: Deduction: -3%

1.3106Pa

PART B: The answers are NOT correct!

ANSWER 1: Deduction: -3%

3.7105Nm2

ANSWER 2: Deduction: -3%

3.7105Pa

ANSWER 3: Deduction: -3%

3.7104Pa

ANSWER 4: Deduction: -3%

3.67105Nm2

P =

1.31107Nm2

Part A) pressure on one heel = ½mg/A

Because half weight will be acting on one shoe so pressure = 0.5×60×9.8/(0.45×10^-4) = 6.53×10^6 Pa

Part B) pressure on floor by one wide heel = 0.5×60×9.8/(16×10^-4) = 183750 Pa

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