True or False: Without friction or work by an external force, the sum of the pot
ID: 2137801 • Letter: T
Question
True or False:
Without friction or work by an external force, the sum of the potential and kinetic energies of a body is constant.
TrueFalse
Work is done when the form of energy changes.
TrueFalse Less power is required while lifting a box up quickly than while slowly lifting it.
TrueFalse Energy conservation law for a projectile (no friction): Potential energy decrease equals the kinetic energy increase.
TrueFalse A source of energy is required to do work.
TrueFalse Work cannot be done in the absence of motion.
Explanation / Answer
TRUE
TRUE
TRUE
TRUE
TRUE