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Using Forces
What you should know.
- Forces are usually a
push or a pull.
- Forces are measured
using a newtonmeter and the unit of force is Newtons.
- Forces work in pairs
- as you push down on a table the table pushes up with equal force.
- When there is no
change in velocity or shape of an object then the forces are balanced e.g.
book on table
- When there is a
change in velocity or shape of an object then the forces are not balanced
e.g. person falling through ice.
- An example of a force
is gravitational force. To work out the weight of an object (with gravity
working on it) you use the following formula:
- Weight (N) = mass
(kg) x gravitational force (N/kg)
- The main formula to
use to work out forces is:
- Force (N) = mass
(kg) x acceleration (m/s/s)
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