Question

Is the box moving at a constant speed? Explain how you know. What does this tell you about the kinetic energy of the system

Answer 1

The box is moved at constant speed, then the change in kinetic energy is zero.

Step-by-step explanation:

Let suppose that box moves at constant speed, meaning that its kinetic energy (
`K`), measured in joules, is expressed by the following equation:

`K = (1)/(2)\cdot m\cdot v^(2)` (1)

Where:

`m` - Mass, measured in kilograms.

`v` - Speed, measured in meters per second.

If the box moves at constant speed, then we notice that
`v_(f)^(2)-v_(o)^(2) = 0`, therefore,
`\Delta K = 0`. In a nutshell, if the box is moved at constant speed, then the change in kinetic energy is zero.