A nail is driven into a wooden board by using a hammer. the impact of hammer on the head of the nail reduces the thrust of 25N. If the area of head is 0.5mm square and the tip is 0.1mm square.Find the pressure of head and tip
Answers
begin mathsize 12px style Let space straight P subscript 1 space be space the space pressure space on space head space and space straight P subscript 2 space be space the space pressure space on space tip space of space the space nail.
straight P subscript 1 space equals space straight F over straight A subscript 1 space equals space fraction numerator 25 straight N over denominator 0.5 space cross times space 10 to the power of negative 6 end exponent straight m squared end fraction space equals space 50 space cross times space 10 to the power of 6 Nm to the power of negative 2 end exponent
straight P subscript 2 space equals space straight F over straight A subscript 2 space equals space fraction numerator 25 straight N over denominator 0.1 space cross times space 10 to the power of negative 6 end exponent straight m squared end fraction space equals space 25 space cross times space 10 to the power of 7 Nm to the power of negative 2 end exponent end style