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Sc Ch. 13
Sc Vocab and Questions
Question | Answer |
---|---|
a push or pull that acts on an object | force |
a device that changes the direction or the amount of force needed to do work | machine |
the state of an object when all forces acting on it balance each other | equilibrium |
the speed and direction of an object's motion | velocity |
the rate at which the velocity of an object changes over time | acceleration |
the rate at which work is done | power |
the tendency of an object to resist any change in motion | inertia |
something that is done when a force moves an object | work |
An object resista a change in motion because of _______________. | inertia |
A ___________is a device that makes work easier | machine |
The ___________ of a moving object describes its speed and direction. | velocity |
When all forces acting on an object balance each other, the object is said to be in a state of _____________. | equilibrium |
Gravity is __________ that pulls objects toward the center of the Earth. | force |
_________ is done when a force moves on an object. | Work |
__________ is the rate at which velocity changes. | Acceleration |
__________ is the rate at which work is done. | Power |