| A | B |
|---|
| Gravitational Force | attractive force that exists b/w all objects, weakest of all the 4 forces , acts over the longest distance |
| electromagnetic force | gives materials their strength, ability to bend, squeeze, stretch etc. |
| Strong nuclear force | holds particles in a nucleus together, strongest of all the forces, acts over the smallest distance |
| weak force | involved in radioactive decay of some nuclei, form of electromagnetic force |
| Newtons 1st law | object stays at rest unless its acted upon or moves in constant velocity in a straight line; an object wont move unless u push it |
| Newtons 2nd law | acceleration of a body is directly proportional to the net force on it and inversely proportional to its mass; F=MA ; shoot a gun the acceleration of the bullet is 2 x's its force |
| Newtons 3rd law | when an object exerts a force on a second object, the second object exerts a force on the force in equal magnitude but opposite direction; u push something it pushes back |
| Mass | amount of matter or inertia an object has |
| weight | gravitational force exerted by the earth on an object W=MG |
| static friction | force that opposes the start of motion |
| sliding kinetic friction | force that opposes motion since the object is moving |
| Action reaction pairs | work on different objects and they are always equal and opposite ex. pull on the cart and the cart pulls on me |
| net force | sum of all forces causes acceleration, forces work on the same object ex. i pull on the cart and friction pulls on the cart |
| resultant | single vector that acts as sum of 2 or more vectors (sum of forces) |
| equilibrant | force that is equal & opposite to the resultant force, force brings the system to equilibrium |
