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Physics Ch 6
Question | Answer |
---|---|
Is acceleration directly or inversely proportional to force? | Directly |
Is acceleration directly or inversely proportional to an object's mass? | Inversely |
What is the equation between mass, force and acceleration? | F=MA |
What is terminal velocity? | Constant velocity due to air resistance |
If a heavy person and a light person are falling at the same time who will fall faster? | The heavy person. |
Why will to objects of different mass hit the ground at the same time? | The object smaller in mass has a proportionally small force acting upon it, it's easier to move. The object with more mass has a proportionally bigger force pulling on it, it's harder to pull. |
What must the net force be for an object to be traveling at a constant velocity? | Net Force=0 |
What does free fall mean? | It means falling with no air resistance. |
What does constant force on an object produce? | Constant acceleration. |
How do friction and weight relate? | As weight increases, so do friction forces (directly proportional). The friction forces will always be slightly less than the weight at constant velocity. |
What are the units for pressure? | Newtons per meter squared or pascals. |
What is the terminal velocity of a person with their parachute open? | 15 km/h down. |