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science study 1

forces and motion

speed how fast an object moves
velocity speed and direction
acceleration rate at which velocity changes
deceleration decrease in velocity
why do you weigh less on the moon? weight depends on gravity and there is less gravity on the moon
what 3 forces can slow you down when your riding a bike? friction, air resistance, and gravity
universal law of gravitation gravity depends on mass and distance
newtons 1st law(law of inertia) a body in motion will stay in motion until a net force acts on it and a body at rest will stay at rest until a net force acts on it.
friction force between surfaces that poopses motion
force push or pull- measured in Newtons(N)
static friction force is applied but the objest doesnt move.
rolling friction has wheels
liquid friction has to do with water
lubricants reduces friction
Created by: babymich1025