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4.
A block of copper of density 8.9 g/cm² measures 5 cm x 3 cm x 2 cm.
Given that the force of gravity is 10 Nkg !, determine:
(a) the maximum pressure.
(b) the minimum pressure that it can exert on a horizontal surface​

Respuesta :

kakil

Answer:

(a)  4450n/m²

(b)  1780n/m²

Explanation:

maximum pressure=small area

Area=3cm*2cm=6cm²

mass=density*volume

8.9*(5*3*2)=267grammes       force=mass*gravity    0.267*10=2.67

pressure=force/area                2.67/0.0006(change 6cm²intom²)=4450

Answer  (a)=4450

minimum pressure=Force/Area                             5*3=15cm²(into m²)

15/10000=0.0015m²                2.67/0.0015=1780

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