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Physics - chapter 5
Question | Answer |
---|---|
The term for the rate at which velocity is changing | acceleration |
What acceleration of an object depends on | net force |
This law says the acceleration produced by a net force on an object is directly proportional to the magnitude of the net force and is inversely proportional to the mass of the object | Newton's second law |
in order for friction to act on two objects they must be ____. | touching |
Any substance that flows, can be liquids or gases | fluid |
What is the term for the friction acting on something moving through air? | air resistance |
A(n)___ is a sketch showing all the forces acting on an object. | free-body diagram |
___ is the amount of force exerted per unit of area. | pressure |
What is the relationship between force and the acceleration on an object | directly proportional |
What is the relationship between force and the mass of an object? | indirectly proportional |
What is the SI unit of pressure? | pascal |
What is the relationship between pressure and area? | indirectly proportional |
What is the relationship between pressure and force? | directly proportional |
____ is the speed at which the acceleration of a falling object is zero because friction balances the weight | terminal speed |
____ is terminal speed together with the direction of motion for falling objects | terminal velocity |
a push or a pull | force |
the SI unit of force | newton |