Work, Power, Energy Concepts true false question?

1 Without friction or work by an external force, the sum of the potential and kinetic energies of a body is constant.


2 Work is done when the form of energy changes.


3 Work cannot be done in the absence of motion.


4 Less power is required while lifting a box up quickly than while slowly lifting it.


5 Energy conservation law for a projectile (no friction): Potential energy decrease equals the kinetic energy increase.


6 A source of energy is required to do work.Work, Power, Energy Concepts true false question?
1)T


2)T


3)T


4)F


5)T


6)T

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