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Chpt. 5 Motion
Chapter 5 motion science
Question | Answer |
---|---|
Change in position over time relative to a reference point | Motion |
Common Reference Point | Earth's Surface |
Distance/Time | Speed |
Speed doesn't change | Constant Speed |
Total Distance/Total Time | Average Speed |
Object that travels at a normal speed | Average Speed |
Speed in a given direction | Velocity |
Combine Velocities by adding or subtracting | Resultant Velocities |
Combine Velocities in the same direction | Adding |
Combine Velocities in opposite directions | Subtracting |
Rate of change in Velocity | Acceleration |
Increase in Acceleration | Positive Acceleration |
Decrease in Acceleration | Negative Acceleration or Deceleration |
Push or Pull and Expressed in Newtons | Force |
Combination of all of the forces acting on an object | Net Force |
Force applied in same direction | Balanced Force |
Net Force is... | Zero Newtons |
Object at...will stay at... | Rest, Rest |
Combined Net Force Doesn't equal | Zero |
A Force that opposes Motion between two surfaces that come in contact with each other | Friction |
2 types of Friction | Kinetic and Static Friction |
Friction between two moving objects | Kinetic Friction |
Friction between two NOT moving objects | Static Friction |
Use Lubricants or Smoother Surfaces | Reduce Friction |
Make surfaces rougher | Increase Friction |
Force of Attraction between objects due to their masses | Gravity |
Stated that gravity is a invisible force which can cause objects to move | Sir Issac Newton |
Gravitational Force... as mass increases | Increases |
Gravitational Force... as distance increases | Decreases |
Weight Depends on the Force of | Matter |
A measure of the force of gravity and measured in Newtons | Weight |
...is Amount | Mass |