friction
friction
because with out it we all fall down
because with out it we all fall down
friction is a contact force
kinetic friction
friction
the force that opposes the motion of two touching surfaces is velocity.
friction
Pretty sure that's friction you're describing.
because with out it we all fall down
"friction"
because without it we all fall down
because with out it we all fall down
Friction
Because without it ... we all fall down.
Friction.
opposes changes in current