Question

 What is the pressure exerted on a 100 cm2 plate by a weight of 200 N resting on the plate? 0 A) 20 MPa O B) 20,000 kPa C) 2 Pa ○ D) .05 Pa 0 E) 20 kPa Save

Answer 1

Answer:

The answer is E) 20kPa  

Explanation:

Here we use the definition of Pressure: Pressure is a physical quantity that measures the projection of force in the perpendicular direction per unit area. In this case, wehave a 200N Force over a 100cm^2 Area

In order to have the pressure in international units we need to convert those cm^2 to m^2 this way:

We know 100cm is equal to 1m

$(100cm^2)*((1m^2)/(100cm)^2)$

In this case, the area will be equal to 0,01m^2

With this information we use the Pressure equation, which based on the definition will be:

$P=F/A$

Solving:

$P=(200N)/(0,01m^2)$

$P=20000Pa$

Then P is the same as 20kPa