Which of the following equations best describes the energy at point C. assuming energy is conserved?
OA. PEA = KEC
O B. PEA = KEc+PEC
OC. PER = KEc+ PEC
OD. PEB = PEC

B. PEA = KEC. +PEC

Explanation:

From the figure it is clear that there is interconversion between potential energy ( PE ) and kinetic energy ( KE ) , so that total mechanical energy is conserved .

At A only potential energy exists . Kinetic energy is zero .

At B only kinetic energy exists . Potential energy is zero .

At C both potential and kinetic energy exist .

So Potential energy at A is equal to potential energy at C and kinetic energy at C

Ie , PEA = KEC + PEC .

Option B is correct .

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