Work
This is the formula for work done by a force.
What is W = F ⋅ d?
Kinetic energy is the energy of ________.
What is motion?
Gravitational potential energy depends on an object's ________ and ________.
What are height and mass?
The law of conservation of energy states that energy cannot be ________ or ________.
What are created, destroyed?
Power is the rate at which ________ is done.
What is work?
Work is done on an object only when the object is ________.
What is moved?
The formula for kinetic energy is ________.
What is KE = (1/2)mv2?
The formula for gravitational potential energy is ________.
What is PE = mgh?
The total energy in a closed system remains ________.
What is constant?
The formula for power is ________.
What is P = W / t?
True or False: If you hold a heavy box still above your head, you are doing work on the box.
What is False?
According to the work-energy theorem, the work done on an object is equal to the change in its ________.
What is kinetic energy?
True or False: Gravitational potential energy increases as an object is raised to a higher position.
What is True?
In a pendulum, at its highest point, the energy is mostly ________ energy.
What is potential?
The SI unit of power is the ________.
What is watt (W)?
The SI unit of work is the ________.
What is joule (J)?
If the velocity of an object doubles, its kinetic energy increases by a factor of ________.
What is four (4)?
The reference point for gravitational potential energy is usually taken to be ________.
What is ground level or zero height?
As the pendulum swings down, potential energy is converted to ________ energy.
What is kinetic?
One watt is equal to one ________ per second.
What is joule?
If a force is applied at an angle θ to the direction of displacement, the work done is given by ________.
What is W = Fd cos θ?
True or False: The work-energy theorem states that the net work done by forces on an object results in a change in the object's kinetic energy.
What is True?
If an object falls freely, its potential energy is converted into ________.
What is kinetic energy?
True or False: Energy transformations in a closed system can increase the total energy of the system.
What is False?
If a machine does 500 J of work in 10 seconds, its power output is ________.
What is 50 watts?