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Work, Power, Energy
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Gravity
Terms in this set (24)
Force
A push or pull on an object
Newtons
The SI unit to measure force
Balanced Forces
Net force equals zero, no movement
Unbalanced forces
Net force not equal to zero, movement
Work
When a force causes a change in motion or position of an object.
Work Equation
W = f x d
Joule
SI unit of work and energy
Power
Rate at which work is done
Power Equation
P = W / t
Watt
SI unit of power
Energy
the ability to do work
Gravitational Potential Energy
Energy stored in an object due to its vertical position or height
Gravitational Potential Energy equation
GPE = m x g x h
Kinetic Energy
Energy of motion
Kinetic Energy Equation
KE = 1/2 x m x v2
Conservation of Energy
Energy cannot be created or destroyed
Mechanical Energy
The sum of potential and kinetic energy; energy of objects in motion
The value of gravity.
9.8
Friction
Unbalanced force that acts against the direction of motion
Static friction
non-moving friction. Resists the start of motion.
Kinetic friction
moving friction. Will be felt when objects roll, slide or move through a fluid.
Net force
total forces acting on an object
Centripetal force
A force that causes an object to move in a circle
Elastic potential energy
the energy of stretched or compressed objects, like rubber bands or springs
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