Question

what force will be required to exert a pressure of 20000 pa on an area 40 cm²​

Answer 1

Answer:

80 N

Explanation:

Pressure = $\frac{Force}{Area}$

⇒ 20000 = $\frac{F}{40 \ cm^{2} }$

We need to convert cm² to m².

1 m = 10² cm ⇒ 1 m² = (10²)² cm² = $10^{4} cm^{2}$

⇒ 1 m² = $10^{4}$ cm²

∴ 20000 = $\frac{F}{40 \ * \ 10^{-4} }$

⇒ F = 2 × $10^{4}$ × 40 × $10^{-4}$

⇒ F = 80 N

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