Forces in action
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13. Forces around us: weight

There are lots of examples of forces all round us.
However, there are 2 forces,
weight and friction, that are always present in our daily lives.

WEIGHT

• Weight is the force of gravity on a body.

• We call a body´s weight the force with which the Earth attracts the body.

• Weight = mass multiplied cy acceleration due to gravity. W = m · g

• This follows directly from F = m a.

• Near the surface of the Earth, g = 9.8 m/s2.

• The acceleration due to gravity on the Moon is much lower than on the Earth’s surface (a = 1,6 m/s2), so, the weight of bodies on the Moon is less than on the Earth´s surface.

Do you know the difference between Mass and Weight? Watch this video to understand the concepts of mass and weight!

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