physics 5
work energy therom
Wnet = KE
gravitational potential energy is always measured in relation to
a zero level
which of the following refers to the sum of kinetic energy and all forms of potential energy
e energy
which of the following is a form of mechanical energy
gravitational potential energy
a force does work on an object if a component of the force
is parallel to the displacement of the object
which of the following is a true statement about the conversion of energy
mechanical energy is always conversed
friction converts kinetic energy to
non mechanical energy
in the presence of frictional force
nonmechanical energy is no longer negligable and mechanical energy is no longer conserved
which of the following us the rate at which energy is transferred
power
which of the following parameters doesn't depend on how resistant a spring its to being compressed or stretched
relaxed length
work is done when
the displacement is not zero
the sign of work is negative
the displacement is perpendicular to the force
if friction is the only force acting on an object during a given physical process, which of the following assumptions can be made in regard to the object's kinetic energy
the kinetic energy decreases
