8 science vocab chap.3
Terms
undefined, object
copy deck
- isomentic
- excercise in which muscle pushews against muscle
- air resistance
- the frictional force air exerts on an object
- horizontal velocity
- speed that goes left to right
- vertical velocity
- speed that goes up and down
- terminal velocity
- greatest velocity reached by a falling object
- law of conservation of momentum
- the total momentum of a group of objects doesn't change unless acted upon by an outside force
- cetripetal acceleration
- acceleration of an object tword the center of a curved or circular motion
- centripetal force
- a force directed tword the center of the circle for an object moving in circular motion
- friction
- force that opposes motion between two touching surfaces
- law of gravitation
- states that any two masses exert an attractive force on each other , the amount of which depends on the mass of the two object and the distance between them
- momentum
- property that a moving object has because of its mass and velocity
- Newton's second law of motion
- States that a net force acting on an object causes the object to accelerate in the direction of the net force
- Newton's third law od motion
- describes action- reaction pair- to every action force there is an equal and opposite reaction force
- weight
- gravitaional force exerted an object by earth