Select True or False for each statement. Work is done when the form of energy ch
ID: 1568841 • Letter: S
Question
Select True or False for each statement. Work is done when the form of energy changes True False Without friction or work by an external force, the sum of and the potential and kinetic energies of a body is constant. True False Less power is required while lifting a box up quickly than while slowly lifting it. True False Energy conservation law for a projectile (no friction): Potential energy decrease equals the kinetic energy increase. True False Work cannot be done in the absence of motion. True False A source of energy is required to do work. True False The side view of a pipe is shown. The pipe diameter increases and then constant. P_i is the pressure and v_i is the speed of aExplanation / Answer
19. False. Work simply results in the change of energy. Not necessarily the form of energy. Example : work done may increase kinetic energy from 5 J to 10 J
20.True
21.False
22.True
23.True
24.True