Question

page 5 of 26
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question 5 (1 point)
use the information and diagrams to answer the following question. assume the diagrams are in a frictionless, closed system.
which of the following statements is true when describing the diagrams?
the total energy of the system remains constant.
the potential and kinetic energies are equal in diagram b.
the potential energy in diagram a is equal to the kinetic energy in diagram c.
the potential energy is greatest in diagram d.

Explanation:

Step1: Recall energy - conservation principle

In a frictionless, closed system, the total mechanical energy (sum of potential and kinetic energies) is conserved.

Step2: Analyze each option

• Option 1: In a frictionless, closed system, the total energy of the system remains constant. This is in line with the law of conservation of energy.
• Option 2: In diagram B, the ball is in - motion and still has some height. So, potential and kinetic energies are not equal.
• Option 3: There is no information to suggest that the potential energy in diagram A is equal to the kinetic energy in diagram C.
• Option 4: In diagram D, the ball is at the lowest point, so its potential energy is the least (assuming the lowest - point as the zero - potential level).

Answer:

The total energy of the system remains constant.