## How To Calculate Distance

Distance or displacement can be calculated using the above equation. If you are interested in the manual calculation of distance without using the mph calculator**, **check out the example below.

- Identify and write down the given values.
- Write down the distance formula
- Place the values and solve the equation.

**Example 1: Find the distance**

Find the distance covered by a car that is moving with an average speed of ** 60 m/s **for

*10 minutes?***Solution:**

**Step 1: **Write down the given values.

*t =**10 minutes = 10 × 60 =**600 seconds*

*va = 60 m/s*

**Step 2: **Write down the equation of distance.

*S = v × t*

*S = 60 × 600*

*S = 36000 m **or 36 km*

This tool can also be used as a travel time calculatorbecause you can find the total time using this tool.

**Example 2: Find the average speed**

Find the average speed of a car if it has covered the distance of ** 200 km** in

*3 hours?***Solution:**

**Step 1: **Write down the values.

*S = 200 km*

**Step 2: **Use the distance equation to find the speed.

*S = v × t*

## How To Calculate Tension In Physics

This article was co-authored by Bess Ruff, MA. Bess Ruff is a Geography PhD student at Florida State University. She received her MA in Environmental Science and Management from the University of California, Santa Barbara in 2016. She has conducted survey work for marine spatial planning projects in the Caribbean and provided research support as a graduate fellow for the Sustainable Fisheries Group.There are 7 references cited in this article, which can be found at the bottom of the page.wikiHow marks an article as reader-approved once it receives enough positive feedback. This article has 15 testimonials from our readers, earning it our reader-approved status. This article has been viewed 1,633,307 times.

In physics, tension is the force exerted by a rope, string, cable, or similar object on one or more objects. Anything pulled, hung, supported, or swung from a rope, string, cable, etc. is subject to the force of tension.XResearch source Like all forces, tension can accelerate objects or cause them to deform. Being able to calculate tension is an important skill not just for physics students but also for engineers and architects, who, to build safe buildings, must know whether the tension on a given rope or cable can withstand the strain caused by the weight of the object before yielding and breaking. See Step 1 to learn how to calculate tension in several physical systems.

## How To Find Initial Velocity

If you want to calculate intitial velocity instantly, then all you need to plug-in the values into the above initial velocity calculator. And, if want to do it manually, then use the below initial velocity formula:

**Formula For Initial Velocity:**

Initial velocity = final velocity

vi = vf at

Read on!

- First of all, you have to figure out which of the displacement , final velocity , acceleration , and the time you have to solve for initial velocity
- If you have Vf, A, and T, then you ought to use Vi = Vf AT
- If you have S, Vf, and T, then you ought to use Vi = 2 Vf
- If you have S, Vf, and A, then you ought to use Vi = Square root of
- If you have S, A, and T, then you ought to use Vi =

**Example :**

A body traveling from 36s and now its speed is 180m/s with an acceleration of 4ms-2. Calculate the initial velocity of the body?

Solution:

S = UT + 1/2 AT^2

V^2 = U^2 + 2AS

Read on!

- First of all, find out which of the initial velocity , acceleration time , and displacement , you have to solve for final velocity.
- If you have U, A and T, then you ought to use V = U + AT
- If you have S, U, and T, then you ought to try V = 2 U
- If you have S, U, and A, then you ought to use V = Square root
- If you have S, A, and T, then you ought to use V = +

**Example :**

A body starts from rest and continues to travel from 40s with an acceleration of 8ms-2.Find the final velocity of the body?Solution:

vf =320ms-1

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## Using The Sig Fig Calculator

The Significant figures Calculator is provided in support of our Physics Tutorials which cover all categories of Physics, a list of the PHysics categories covered is available at the end of this page. The calculation of significant figures in Physics is particularly important, particularly when computing long math equations. This Sig-Fig Calculator will calculate:

These results will be used to find the following physical quantities:

## Estimating The Uncertainty In Measurements

Before you combine or do anything with your uncertainty, you have to determine the uncertainty in your original measurement. This often involves some subjective judgment. For example, if youre measuring the diameter of a ball with a ruler, you need to think about how precisely you can really read the measurement. Are you confident youre measuring from the edge of the ball? How precisely can you read the ruler? These are the types of questions you have to ask when estimating uncertainties.

In some cases you can easily estimate the uncertainty. For example, if you weigh something on a scale that measures down to the nearest 0.1 g, then you can confidently estimate that there is a ±0.05 g uncertainty in the measurement. This is because a 1.0 g measurement could really be anything from 0.95 g to just under 1.05 g . In other cases, youll have to estimate it as well as possible on the basis of several factors.

#### Tips

Generally, absolute uncertainties are only quoted to one significant figure, apart from occasionally when the first figure is 1. Because of the meaning of an uncertainty, it doesnt make sense to quote your estimate to more precision than your uncertainty. For instance, a measurement of 1.543 ± 0.02 m doesnt make any sense, because you arent sure of the second decimal place, so the third is essentially meaningless. The correct result to quote is 1.54 m ± 0.02 m.**Significant Figures:**

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## Using Integration To Calculate The Work Done By Constant Forces

The same integration approach can be also applied to the work done by a constant force. This suggests that *integrating *the product of force and distance is the general way of determining the work done by a force on a moving body.

Consider the situation of a gas sealed in a piston, the study of which is important in Thermodynamics. In this case, the Pressure is constant and can be taken out of the integral:

\text=\int_\text^\text}\text=\text\int_\text^\text \text=\text \Delta \text

Another example is the work done by gravity on a free-falling object :

\text=\int__1}^_2}\mathbf}\cdot\mathbf}\text = \int__1}^_2}\text \hspace \text_\text \text = \text \int__1}^_2} \text=\text\Delta \text

Notice that the result is *the same* as we would have obtained by simply evaluating the product of force and distance.

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## What Is The Formula For Work

**Definition:** In our daily life work implies an activity resulting in muscular or mental exertion. However, in physics the term work is used in a specific sense involves the displacement of a particle or body under the action of a force. work is said to be done when the point of application of a force moves.Work done in moving a body is equal to the product of force exerted on the body and the distance moved by the body in the direction of force.**Work = Force × Distance moved in the direction of force**.

**The work done by a force on a body depends on two factors** Magnitude of the force, and Distance through which the body moves

**Unit of Work**When a force of 1 newton moves a body through a distance of 1 metre in its own direction, then the work done is known as 1 joule.Work = Force × Displacement1 joule = 1 N × 1 mor 1 J = 1 Nm

## Velocity In Real Life :

In fact, you will probably not be drawing graphs to depicts velocity in real-life, velocity in-actual has certain real-life applications. Suppose that youll take a road journey and need to know how to determine how much time it will take you to reach a destination. Likewise, velocity also helps when you need to know how much time an airplane takes to take off. In short, velocity is the term that is a practical part of everyday physics.

**For example:**

If you travelled 50 miles within 1 hour going west, then your velocity is said to be 50 miles per hour westwards, or 50 mph westwards.

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## Examples Using Formula For Work

**Example 1:** 10 Newton of force is applied on a body which displaces it by 2 meters. Calculate the work done by using the formula for work.**Solution: **

= 20Nm

**Answer: 20 Nm of work is done when a 10 Newton of force displaces an object by 2 meters.**

**Example 2: **A coolie at a railway station carries a bag weighing 100 N through some distance. Calculate the work done by the coolie on the bag by using the formula for work.**Solution: **

To find work done by the coolie.

Given: Weight of the bag = 100N

Also, the weight of the bag will be acting in the vertical direction and its motion is in the horizontal direction. So the displacement of the bag in the direction of the force is zero.

d = 0

= 0 J

**Answer: Work done by the coolie on the bag is zero.**

**Example 3: **Calculate the amount of work done by the force in moving the object through a distance of 7 m if an object is horizontally dragged across the surface by a 150 N force acting parallel to the surface.**Solution: **

To find: Work done by the force in moving the object through a distance of 7 m

Given: F = 150 N, d = 7 m

Since F and d are in the same direction,

= 0,

W = F × Cos × d

= 150× 7 × Cos 0

= 1050 J

**Answer: The amount of work done by the force in moving the object is 800 J.**

## Absolute Vs Relative Uncertainties

Quoting your uncertainty in the units of the original measurement for example, 1.2 ± 0.1 g or 3.4 ± 0.2 cm gives the absolute uncertainty. In other words, it explicitly tells you the amount by which the original measurement could be incorrect. The relative uncertainty gives the uncertainty as a percentage of the original value. Work this out with:

So in the example above:

The value can therefore be quoted as 3.4 cm ± 5.9%.

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## Interesting Facts About Speed And Velocity:

- Galileo Galilei was the first scientist who measures speed as distance over time
- A speedometer is said to be the best example of instantaneous speed
- You can also express a speed of light as 186,282 miles per second
- The speed of sound in dry air can be expressed as 343.2 meters per second
- The escape velocity of Earth is referred to as the speed that needed to escape from Earths gravitational pull. It is expressed as 25,000 miles per hour

## Terminal Velocity Escape Velocity And Relativistic Velocity

Velocity is present in many aspects of physics, and we have created many calculators about it! The first velocity is the so-called terminal velocity, which is the highest velocity attainable by a free falling object. Terminal velocity occurs in fluids and depends on the fluid’s density. You can read more about it in our free fall with air resistance calculator.

Knowing how to calculate velocity is of particular importance in astrophysics since results have to be very accurate. If you’re interested in the world of massive celestial objects like suns or planets, visit our escape velocity calculator or orbital velocity calculator. You can learn a lot there!

In the high energy region, there is another important velocity – relativistic velocity. It results from the fact that no object with a non-zero mass can reach the speed of light. Why? When it approaches light speed, it’s kinetic energy becomes unattainable, very large or even infinite. You can check it with the relativistic kinetic energy calculator by filling the velocity field with the speed of light 299,792,458 m/s or 2.998e8 m/s in scientific notation. Moreover, this is a cause of other phenomena like relativistic velocity addition, time dilation, and length contraction. Also the Albert Einstein’s famous E = mc2 formula bases on the relativistic velocity concept.

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## Finding Work With An Angled Force

**Find the force and displacement as normal.**Above, we dealt with work problems in which the object is moving in the same direction as the force being applied to it. In reality, this isn’t always the case. In cases where the force and the object’s motion are in two different directions, the difference between these two directions must also be factored into the equation for an accurate result. To begin, find the magnitude of the force and the object’s displacement as you normally would.

**10 newtons**and that it’s moved the same

**2 meters**forward as before.

**Find the angle between the force vector and the displacement.**Unlike in the examples above, with a force that’s in a different direction than the object’s motion, it’s necessary to find the difference between these two directions in the form of the angle between them. If this information isn’t provided to you, you may need to measure it yourself or deduce it from other information in the problem.

## Si Units Of Work In Physics

There are many instances in which the units used in real-life don’t match the units used in physics, but work is not one of those… kind of. If you look at the work formula, you can see that the units are * for the SI system. The **SI units of work** are, therefore, Joules.

Joules are typically called units of energy, but **energy and work use the same units**, as they are very similar concepts in physics.

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## Work For Force At An Angle

When force is not applied at 0 degrees , use simple trigonometry to find the work done on that object. You need only know how to use cosine and sine for introductory-level problems.

For example, imagine the dog in the above situation standing on the edge of a cliff, so that the rope between the child and the dog makes an angle of 45 degrees with the horizontal snowfield. If the dog applies the same force as before at this new angle, you find that the horizontal component of this force is given = 14.1 N, and that the resulting work done on the sled is = **176.8 J**. The new acceleration of the child is given by the value of the force and Newton’s law, **F** = m**a**: /20 kg) = 0.71 m/s2.

## How To Calculate Work

wikiHow is a wiki, similar to Wikipedia, which means that many of our articles are co-written by multiple authors. To create this article, 20 people, some anonymous, worked to edit and improve it over time. This article has been viewed 212,549 times.Learn more…

In physics, “work” has a different definition than it does in everyday speech. Specifically, the term “work” is used when a physical force causes an object to move. In general, if a strong force causes an object to move very far, a lot of work is done, and if the force is small or the object doesn’t move very far, only a little work is done. Force can be calculated with the formula **Work = F × D × Cosine**, where F = force , D = displacement , and = the angle between the force vector and the direction of motion.

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