The product of the magnitude of the displacement times the component of the force parallel to the displacement. W=Fd
The energy of motion.
Translational Kinetic Energy
The energy of motion for objects moving in a straight line. Given by: Kinetic Energy = 1/2mass*velocity^2
The net work done on an object is equal to the change in the object's kinetic energy. ?KE + ?PE = Work by NC forces.
Energy associated with forces that depend on the position or configuration of an object relative to the surroundings.
Gravitational Potential Energy
Potential Energy due to Earth's gravity. PE = mass*gravity*height
Spring Equation/Hooke's Law
The force that a stretched or compressed spring exerts. F = -kx where k is the spring stiffness constant
Elastic Potential Energy
Potential Energy of Springs Given by Elastic PE = 1/2 kx^2
Forces for which the work done does not depend on the path taken (like gravity or a spring)
Forces for which the work done does depend on path taken (ex: friction)
Total Mechanical Energy
The sum of the kinetic and potential energies at any moment. E=KE+PE
A quantity that remains constant.
Principle of Conservation of mechanical energy
If only conservative forces are acting, the total mechanical energy of a system neither increases nor decreases in any process. It stays constant - it is conserved.
Law of conservation of energy
The total energy is neither increased nor decreased in any process. Energy can be transformed from one form to another, and transferred from one object to another, but the total amount remains constant.
Forces that reduce the total mechanical energy.
the rate at which work is done. P=W/t or P=Fv
A large unit of power. Equal to 746 watts, which are the SI unit of power.
The SI unit of Power. 1 J/s = 1 watt
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