Work
A student carrying a bucket of water along a horizontal path while walking at constant velocity is an example of what
What is Work?
The equation PEelastic = ½ kx^2 is called ______.
What is the Elastic Potential Energy equation?
The equation ME = KE + ΣPE is called
What is the mechanical energy equation?
The quantity Fv is ____.
what is he power supplied to object by the force ?
a joule is also used as the _______.
what is the basic unit for work?
The equation for work is
What is W = Fd?
Spring constant is ______.
What is the ratio of force to displacement for a spring or other elastic material?
Mechanical energy is ______.
What is the sum of kinetic energy and all forms of potential energy?
Watt is the SI unit of _____
what is power?
a watt is defined as _____.
what is one joule per second?
Work is done only when components of a force ______.
What is parallel to a displacement?
The length of a spring when no external forces are acting on it is called the ______ of the spring
what is the relaxed length?
All energy, such as nuclear, chemical, internal, and electrical, that is not mechanical energy is classified as ______.
What is nonmechanical energy?
what is power?
a quantity that measures the rate at which work is done or energy is transformed
the amount of work an object can do because of the object's kinetic and potential energies
what is mechanical enrgy?
Work is negative when the force is in _______.
What is in the direction opposite the displacement?
The theorem that states that the change in kinetic energy of a moving particle is equal to the work done by all of the forces acting on the particle
What is the work-kinetic energy theorem?
In the absence of friction, the total mechanical energy remains the same this principle is called _____.
What is conservation of mechanical energy?
the equation for power is this ______.
what is power = work ÷ time interval ?
other than power = work ÷ time interval the alternative equation for power is ?
what is power = force × speed ?
Work is a _____ and can be positive or negative
What is scalar quantity?
The symbol that represents the spring constant.
What is k?
When frictional forces are present, the principle of mechanical energy conservation no longer holds, because ______.
What is kinetic energy is not simply converted to a form of potential energy?
Power is a _____
a. Vector
b. Scalar
c. Dimensionless
d. None of the above
what is b. scalar
If a runner expends 1850 kJ/h, how long does she have to run to work off 7 lb of body fat?
what is 63.6 hrs?