thatdude112
New member
Can anybody help me with these
Each one is either true or false
1. Work is done when the form of energy changes.
2. Energy conservation law for a projectile (no friction): Potential energy decrease equals the kinetic energy increase.
3. Without friction or work by an external force, the sum of the potential and kinetic energies of a body is constant.
4. Work cannot be done in the absence of motion.
5. Less power is required while slowly lifting a box than while lifting it up quickly.
6. A source of energy is required to do work.
Each one is either true or false
1. Work is done when the form of energy changes.
2. Energy conservation law for a projectile (no friction): Potential energy decrease equals the kinetic energy increase.
3. Without friction or work by an external force, the sum of the potential and kinetic energies of a body is constant.
4. Work cannot be done in the absence of motion.
5. Less power is required while slowly lifting a box than while lifting it up quickly.
6. A source of energy is required to do work.