0309 Exit Ticket (Energy) - syarmine natasha | Biblioteka

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Which of the following statements best describes the principle of conservation of mechanical energy?

The total mechanical energy of an isolated system remains constant if only conservative forces act on it.

The total mechanical energy of a system is always constant, regardless of the forces acting on it.

The mechanical energy of an object is conserved only when non-conservative forces like friction are present.

1

At the highest point of its swing

At the lowest point of its swing

Kinetic energy remains constant throughout the swing

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A roller coaster moving in a frictionless track

A satellite orbiting Earth in a vacuum

A car driving up a hill with friction acting on it

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7 m/s

9.8 m/s

10 m/s

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0.10m

0.15 m

0.20 m

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The mechanical energy is zero

The mechanical energy is purely kinetic

The mechanical energy is purely potential.