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Transcript

NET FORCE 4.6 and 4.7 NET FORCE In the absence of force, objects at rest stay at rest and objects in motion stay in motion With that known, we can also say that in the absence of a NET FORCE objects do not change their state of motion either What is NET FORCE? Net Force is the total amount of all forces working on an object If we were to net all of the forces here we could have 4 forces each working differently in different directions More than one force against each other If we have more than one force working against each other, we simply subtract them to come up with a net force Just like vectors Force can be positive or negative Use the same directions we used for vectors because force is a vector It has both a magnitude and a direction Forces can cancel each other out Just like velocity vectors can cancel each other out so can force vectors If we have the same amount of force going in opposite directions our net force is 0 Newtons. Forces can work together Forces can also work together to have a net gain of force Figure out the Net Forces A B C Equilibrium When net forces on an object are 0 Newtons we can say that the object is in a state of equilibrium Tension Forces If you pull on something to make it tight you are adding tension Tension is a pulling force on an object like a string, cable, chain or other similar object