Energia, lavoro

Multiple Choice

Why is the concept of 'lavoro' (work) significant in physics, and how does it differ from its meaning in everyday language?

• Because in physics, 'lavoro' always involves movement in the direction of force, unlike everyday use where any activity is considered work.

• Because in physics, 'lavoro' is only about lifting objects, while in everyday language it means any activity.

• Because in physics, 'lavoro' is only about balancing forces, while in everyday language it means achieving a result.

• Because in physics, 'lavoro' is not related to force, while in everyday language it is.

Open Ended

Explain how the formula L = F × s is used to calculate work, and describe a situation where force is applied but no work is done according to physics.

Multiple Choice

Which of the following statements about power (potenza) is correct?

• Power is the ratio of work done to the time taken to do it.

• Power is the product of force and displacement.

• Power is the amount of energy stored in an object.

• Power is the same as energy.

Multiple Select

Select all correct statements about energy transformation and conservation based on the example of a bouncing ball.

• Energy can change from potential to kinetic and vice versa.

• The total mechanical energy remains constant if there is no friction.

• All energy is always transformed into kinetic energy.

• Some energy can be transformed into heat due to friction.