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Newton's laws of motion
1st law
"The velocity of a body remains constant unless acted upon by an external force"

An object will remain still or move in a straight line at constant speed unless there is additional force
acting upon it.
If forces are not balanced, the resultant force…

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Conservation of energy
Energy cannot be created or destroyed, only transferred.

Ek=mv²/2

Kinetic energy is the energy of anything moving
Gravitational Potential energy- energy something gains when it is lifted up

Ep=mgh

Elastic potential energy, energy in a stretched rubber band

E=kL²/2




Hookes law
F=kL

Extension of a stretched wire…

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