Which formula is used to calculate acceleration?

The formula used to calculate acceleration is based on the change in velocity over time. Acceleration is defined as the rate at which an object's velocity changes with respect to time. When an object speeds up, slows down, or changes direction, we can quantify this change using the formula for acceleration:

[ a = \frac{\Delta v}{\Delta t} ]

where ( \Delta v ) represents the change in velocity and ( \Delta t ) is the time over which this change occurs. This relationship is fundamental in physics and provides a direct measure of how quickly an object speeds up or slows down.

The other options provided do not accurately reflect the definition of acceleration. The change in position over time, for example, refers to velocity rather than acceleration. Force divided by mass transforms into acceleration according to Newton's second law, but it is not a direct formula for calculating acceleration itself in a straightforward way. Lastly, work divided by energy does not relate to acceleration, as it deals with different concepts in physics.