a rectangular wooden block is placed on a table on its face A that has sides 5 cm each, and then on face B that has sides 5cm and 8cm. Calculate the area of each face, Which face has a greater area?if the force exerted by the block on the table is 5N, calculate the pressure exerted by each face.Which hace exerts more pressure?
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Answer:
Area of face A is 25 cm² , area of the face B is 40 cm² , face B has greater area. Pressure exerted by face A is 0.2 Pascal and pressure exerted by the face B is 0.125 Pascal . Face A exerts more pressure.
Explanation:
According to the question ,
Face A is a square plane having 5 cm of sides .
Then , the area of face A is , 5² = 25 cm²
According to the question ,
Face B is a rectangular surface having sides of 5 cm and 8 cm .
then , the area of face B is ( 5 × 8 ) = 40 cm²
Clearly , face B has the higher area.
The force exerted by the rectangular block is 5 N .
∴ The pressure exerted by the face A is ( 5/25 ) = 0.2 Pascal
∴ The pressure exerted by the face B is ( 5/40) = 0.125 Pascal
Clearly , face A exerts more pressure.