Select True or False for each statement. A source of energy is required to do wo

Question

Select True or False for each statement. A source of energy is required to do work. More power is required while slowly lifting a box than while iftin Woue auinkt be done in the absence of motion Without friction or work by an external force, the sum of the potential and kinetic energies of a body is constant. Work is done when the form of eñergy changes. Energy conservation law for a projectile (no friction): Potential energy increase equals the kinetic energy decrease. Suomit Anseaver Tries 0/12 This discussion is closed. Send Feedback

Explanation / Answer

1.true, work = (force)(distance), and energy must be required to move the object.

2.True, P = W/t, low power means more time and vice versa

3.False, W = Fd, which means if d is 0, W is 0.

4.True, energy is not lost based on Conservation of Energy.

5.true,  Generally, the form of energy changes when work is done. If you lift a weight, the energy is consumed in friction (heat) and potential energy.

6.True, the change in kinetic energy equals the change in potential energy

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