# Equations

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What’s the formula and unit for stress?

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### 13 Terms

1

What’s the formula and unit for stress?

Stress (Nm²) = force (N) x cross sectional area (m²)

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2

Whats the formula and unit for strain?

Strain (no unit) = extension OR change in length / original length

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3

What’s the formula for young’s modulus?

• Stress (Nm²) / strain

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4

What’s the formula and units for the area of a square/rectangle?

• Length x width

• (unit)²

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5

What’s the formula and units for the area of a triangle?

• ½ x base x height

• (unit)²

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6

What’s the formula for the area of a circle?

pi x r²

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7

What’s the formula for volume?

Cross sectional area x height

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8

What’s the formula for cuboids?

Cross sectional area x height

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9

What’s the formula for prisms?

1/3 x cross sectional area x height

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10

What’s the formula for density?

Mass

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