| A | B |
|---|
| acceleration due to gravity | 9.8 meters per second squared |
| Galileo | said mass of an object does not effect how fast it falls |
| terminal velocity | constant velocity of falling objects due to air resistance |
| free fall | when only the force of gravity acts on a falling object |
| projectile motion | curved path of a thrown object |
| centripetal force | force that causes the moon's orbit around earth to curve |
| weightless | Objects in orbit appear __ because they are in free fall |
| Objects at Rest and Objects in Motion | Two parts of Newton's First Law of Motion |
| Friction | An unbalanced force that acts on motion |
| Inertia | when objects resist a change in motion |
| One way to measure inertia is to | measure mass |
| If you increase the force, what happens to acceleration? | acceleration increases |
| A tank is harder to move than a car because a tank has more | mass |
| The reaction force is | equal and opposite to the action force |
| Momentum depends on | mass and velocity |
| Momentum before a collision is | equal to momentum after the collision |
| What happens to momentum when objects collide | some or all of the momentum is transferred |
| Conservation of momentum means | momentum isn't gained or lost |
