| A | B |
|---|
| A ___________ force causes no change in motion. | balanced force |
| The tendency of an object to resist a change in motion. | inertia |
| An attractive force that two masses exert on each other | gravity |
| When the force of air resistance equals the force of gravity on a falling object. | terminal velocity |
| The fact that an unbelted passenger will continue to move forward in a collision is best explained in | Newton's 1st Law |
| The fact that an air bag reduces the negative acceleration and therefore reduces the impact force | Newton's 2nd Law |
| Falling objects experience growing levels of air resistance due to the fact that they ________ as they fall | accelerate |
| Your ______ weight in an elevator only changes if it is accelerating | apparent |
| A type of force found in wires and ropes | tension |
| All ______ forces result in acceleration | unbalanced |
| The force vector that is perpendicular to the surface | normal |
| Another name for the weight of an object is ______ force. | gravitational |
| Any force that opposes the motion of objects in contact with each other | friction |
| Tension, Normal and Friction are all examples of “______ forces” | contact |
| Magnetic and _______ are 2 examples of field force | gravity |
| The vector sum of all forces acting on an object | net force |
| A ratio value that suggest a level of “traction” a specific surface has with another | mu (coefficient of friction) |
| Action-Reaction forces involve 2 forces and ____ object(s) | 2 |
| A Balanced forces involve multiple forces on ____ object(s) | 1 |
