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Newton law of motion
IPC 2-6 voab
Term | Definition |
---|---|
Motion | A Movement |
Force | A push or pull that acts on an object; Measured in Newtons (N) |
Weight | The force of gravity acting on an Object |
Net Force | The overall force acting on an object after all the forces are combined |
a) balanced force | Net force at zero , no change in objects accelerates |
b)unbalanced force | Net force not equal to zero,object accelerates |
Mass | The amount of matter in an object |
Intertia | the tendency of an object to resist a change in its motion |
Accerleration | the rate at which velocity changes results from change in speed and or direction |
Velocity | The speed and direction an object is moving measured relative to a reference |
Newton's first law | the state of motion of an object does not change as long as the net force acting on the object is zero |
Newton's second law | -the acceleration of an object is equal to the net force acting on it divided by the object's mass |
Acceleration | (a) = Net force (F) / Mass (m) |
Newton's third law | -whenever one object exerts a force on a second object (action force), the second object exerts an equal and opposite force (reaction force) on the first object |
Friction | a force that opposes the motion of objects that touch as they move past each other |
Static friction | acts on objects that are not moving (example: keeps shoe from sliding when you take a step) |
Sliding friction | opposes the direction of motion of an object as it slides over a surface |
Rolling friction | Acts on rolling objects and is significantly lower than other types of friction |
Gravity | an attracting force that acts between any two masses |
Air resistance | —fluid friction acting on an object moving through the air; increases with speed; increases if surface area of moving object increases |
Terminal Velocity | —the constant velocity of a falling object when the force of air resistance equals the force of gravity |
Momentum | the product of an object’s mass and its velocity (Momemtum = Mass x Velocity); an object with a large momentum is difficult to stop |