Question
Statement 1If there are conservative and non-conservative forces acting, the mechanical energy, is conserved. andStatement 2Energy may be transformed from one kind to another but it cannot be created or destroyed.
Step 1
" We know that mechanical energy is conserved only in the presence of conservative forces. Non-conservative forces, such as friction, can cause a loss of mechanical energy. Therefore, this statement is incorrect. Show more…
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Statement-1: Toul mechanical energy of a particle may be conserved, cven if there are nonconservative forecs acting on the parlicle. Statement-2: Work done by non-conservative forecs acting on a particle may be zero.
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Section E
The law of conservation of energy states that energy cannot be created or _______.However, energy can be _________ from one substance to another. the first blank is ' destroyed ' and for the second blank is ' transferred '
Statement 1 The conservative force is the negative gradient of potential energy $\left(\mathrm{F}=-\frac{\mathrm{dU}}{\mathrm{dx}}\right)$ and Statement 2 Potential energy can be defined only for conservative forces.
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