Definition and calculation of time
The formula for time is the ratio of the distance to the average speed, which can be described by the formula: t = d/s, where:
d= is the distance,
s = the average speed
Derivation of the time formula for t
In order to easily derive the formula for time, we can use the commonly known formula for speed – which can be found, for example, in a car speedometer. Speed is described in km/h, and km is the distance (d) and t is the unit of time.
Thus, transforming the formula for average speed s = d/t, we multiply it by t
then we have s*t = d, then we divide by d on both sides and get the final formula for time: t = d/s
Simply put, according to the time formula, to calculate the duration of a something motion, we divide the distance travelled by the average speed at which it is moving.
An example in which we use the time formula
Calculate the time taken by the driver of a car to cover a distance of 120km with an average speed of 60km/h
Data from the task:
d = 120km
s = 60km/h
Looking for
t =
According to the formula for time t = d/s, substitute into the formula:
t = 120/60 = 2
t = 2h
Answer: According to the time formula, the driver covered the distance in 2 hours.
In physics, time is a scalar physical quantity. With the help of the time formula, it is possible to determine the sequence of events travelled and the intervals between events that occur at the same time. The concept of time was the subject of physical and philosophical considerations of scientists such as Newton, Einstein, Leibniz, Barkeley, Plato, St. Augustine, Kant, Bergson, Husserl and Heidegger.
As time has progressed, we have come to understand: a moment, a segment of time, a point of time, duration, the set of all points and periods of time, and in the theory of relativity the fourth coordinate of space-time.
Key takeaway
Formula for time: Discussion and analysis of the time formula We explain and introduce the topic of the time formula. Read our compendium on the time formula.
When to use it?
List the physical quantities together with units.
Answer check
- List the physical quantities together with units.
- Write the formula for "Formula for time" and rearrange it before substituting numbers.
- After calculating, check the unit and the order of magnitude.
User-focused answer
Formula for time: Discussion and analysis of the time formula We explain and introduce the topic of the time formula. Read our compendium on the time formula. Use this topic when the task asks for more than a name: you must identify the condition, choose the rule and justify the result.
When this topic is actually needed
Use this topic when the task asks for more than a name: you must identify the condition, choose the rule and justify the result. Formula for time: quantity, unit and relationship. Start with one clear definition sentence, then show the rule, and only then substitute the data.
The most common mistake is remembering the term but ignoring the condition in the task. If the answer has a unit, keep the unit with every number; if it is a language or glossary topic, show the term in a full sentence.
Complete way to work with the topic
- name the given data and the unknown
- write the definition or relationship
- test it on a simple example
- check the unit, range or sentence meaning
If the answer has a unit, keep the unit with every number; if it is a language or glossary topic, show the term in a full sentence. Start with one clear definition sentence, then show the rule, and only then substitute the data. If the answer has a unit, keep the unit with every number; if it is a language or glossary topic, show the term in a full sentence.
Worked example with commentary
Formula for time: Start with one clear definition sentence, then show the rule, and only then substitute the data. If the answer has a unit, keep the unit with every number; if it is a language or glossary topic, show the term in a full sentence.
| User-focused answer | What to remember |
|---|---|
| When this topic is actually needed | quantity, unit and relationship |
| Mistakes that usually weaken the answer | The most common mistake is remembering the term but ignoring the condition in the task. |
| Complete way to work with the topic | If the answer has a unit, keep the unit with every number; if it is a language or glossary topic, show the term in a full sentence. |
Mistakes that usually weaken the answer
The most common mistake is remembering the term but ignoring the condition in the task. The most common mistake is remembering the term but ignoring the condition in the task. Start with one clear definition sentence, then show the rule, and only then substitute the data.
Explain the topic in your own words. Create an example that shows when the rule can be used. Name one possible mistake and correct it.
Check exercises
- Explain the topic in your own words.
- Create an example that shows when the rule can be used.
- Name one possible mistake and correct it.
What to remember: Formula for time. Use this topic when the task asks for more than a name: you must identify the condition, choose the rule and justify the result. Start with one clear definition sentence, then show the rule, and only then substitute the data.