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what is force measured in
newtons
what is a force
a push or pull movement
types of forces
gravity,friction,air resistance,tension compression
balances forces
no change in motion
unbalanced forces
objects move or change direction
elastic deformation
objects return to shape
inelastic deformation
objects stay squashed or stretched
sound
a longitude wave moves back and forth
amplitude
how loud the sound is
frequency
pitch
echo
reflection of the sound
light
a transverse wave moves up and down