Mechanical Energy and Conservation Quiz

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Which of the following is the correct equation for mechanical energy?

$ME = PE + KE$ (correct)

$ME = PE / KE$

$ME = PE - KE$

$ME = PE \cdot KE$

According to the principle of conservation of mechanical energy, what happens to the mechanical energy of an isolated system subject only to conservative forces?

It increases

It remains constant (correct)

It is unpredictable

It decreases

If an object moves in the opposite direction of a conservative net force, what happens to its potential energy?

It increases (correct)

It is unpredictable

It decreases

It remains constant

If the speed (not the velocity) of an object changes, what happens to its kinetic energy?

It increases Signup and view all the answers

In real systems, what type of forces are usually present that can cause a change in mechanical energy?

Frictional forces Signup and view all the answers

Which of the following is an example of a nonconservative force?

Friction Signup and view all the answers

In an elastic collision, what happens to the kinetic energy of the objects involved?

It is conserved Signup and view all the answers

Who discovered the equivalence between lost mechanical energy and an increase in temperature?

James Prescott Joule Signup and view all the answers

What is the principle of conservation of mechanical energy?

The sum of potential energy and kinetic energy is constant Signup and view all the answers

What happens to the potential energy of an object if it moves in the opposite direction of a conservative net force?

It increases Signup and view all the answers

Mechanical Energy and Conservation Quiz

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Questions and Answers

Which of the following is the correct equation for mechanical energy?

According to the principle of conservation of mechanical energy, what happens to the mechanical energy of an isolated system subject only to conservative forces?

If an object moves in the opposite direction of a conservative net force, what happens to its potential energy?

If the speed (not the velocity) of an object changes, what happens to its kinetic energy?

In real systems, what type of forces are usually present that can cause a change in mechanical energy?

Which of the following is an example of a nonconservative force?

In an elastic collision, what happens to the kinetic energy of the objects involved?

Who discovered the equivalence between lost mechanical energy and an increase in temperature?

What is the principle of conservation of mechanical energy?

What happens to the potential energy of an object if it moves in the opposite direction of a conservative net force?

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