# How to Calculate the Weight of Timber

Written by bretn
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Weight is the force that an object exerts on its surroundings. To find weight, we look to Newton's law, and find that force = mass * acceleration, or F = ma. To find the weight of a stationary, cylindrical piece of Oregon pine on the earth's surface, we need to know its mass and the acceleration of gravity, which is 9.8m/s^2. We can now see that F = ma is equivalent to weight = mass * gravity, or W = mg.

Skill level:
Moderate

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## Instructions

1. 1

Find the density of the material; according to Engineering Tool Box, the density of Oregon pine is 530 Kg/m^3.

2. 2

Find the volume of the wood by multiplying pi * radius^2 * height. The radius and the height should be in meters.

3. 3

Multiply the volume by the density to get the mass of the object.

4. 4

Multiply the mass of the object by the acceleration of gravity to find the weight of the object.

#### Tips and warnings

• Take exact measurements to ensure that your calculations of the weight are accurate.

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