**Method 3**

**Given Multiple Speeds for Different Amounts of Time**

- Assess what information you are given. Use this method if you know:
- Set up the formula for average speed.
- Determine the total distance.
- Determine the total time.
- Divide the total distance traveled by the total time spent traveling.

How do we calculate for speed?

For a body moving at a uniform velocity you can

**calculate**the**speed**by dividing the distance traveled by the amount of time it took, for example one mile in 1/2 hour would give you 2 miles per hour. If the velocity is non-uniform all you can say is what the average**speed**is. Same**calculation**.1

## What is the formula for distance?

An easy way to

**remember**the distance,**speed**and time equations is to put the letters into a triangle. The triangles will help you**remember**these 3 rules: Distance =**Speed**x Time. Time = Distance/**Speed**.2

## What is the formula for calculating average speed?

The

**average speed**of an object is the total distance traveled by the object divided by the elapsed time to cover that distance. It's a scalar quantity which means it is defined only by magnitude. A related concept,**average**velocity, is a vector quantity.3

## How do you find the displacement?

To

**calculate displacement**, simply draw a vector from your starting point to your final position and solve for the length of this line. If your starting and ending position are the same, like your circular 5K route, then your**displacement**is 0. In physics,**displacement**is represented by Δs.4

## How do you calculate work done?

The

**work**is calculated by multiplying the force by the amount of movement of an object (W = F * d). A force of 10 newtons, that moves an object 3 meters, does 30 n-m of**work**. A newton-meter is the same thing as a joule, so the units for**work**are the same as those for energy – joules.5

## How do you find the velocity?

**Method 1**

**Finding Average Velocity**

- Find average velocity when acceleration is constant.
- Set up an equation with position and time instead.
- Find the distance between the start and end points.
- Calculate the change in time.
- Divide the total displacement by the total time.
- Solve problems in two dimensions.

6

## How do you find the rate of something?

To

**find**the unit**rate**, divide the numerator and denominator of the given**rate**by the denominator of the given**rate**. So in this case, divide the numerator and denominator of 70/5 by 5, to get 14/1, or 14 students per class, which is the unit**rate**.7

## How do you calculate meters per second?

Divide the distance by the time. Plug the two values into the

**formula**and divide. This will give you the speed. If the units on the graph were listed in units other than**meters per second**, you will need to convert the units to find the speed in**meters per second**.8

## What is speed measured in?

The SI unit of time is the second. The SI unit of

**speed**and velocity is the ratio of two — the meter per second. This unit is only rarely used outside scientific and academic circles. Most people on this planet**measure speeds**in kilometer per hour (km/h or sometimes kph).9

## How do you find the average velocity?

**Average Velocity**, General. The

**average**speed of an object is defined as the distance traveled divided by the time elapsed.

**Velocity**is a vector quantity, and

**average velocity**can be defined as the displacement divided by the time.

10

## How do you find the average?

The mean is the

**average**of the numbers. It is easy to calculate: add up all the numbers, then divide by how many numbers there are. In other words it is the sum divided by the count.11

## What is a unit of speed?

Speed has the dimensions of distance divided by time. The

**SI unit**of speed is the metre per**second**, but the most common unit of speed in everyday usage is the kilometre per hour or, in the US and the UK, miles per hour. For air and marine travel the knot is commonly used.12

## What is the formula of force?

The formula for force says force is equal to mass (m) multiplied by acceleration (a). If you have any two of the three variables, you can solve for the third. Force is measured in Newtons (N), mass in kilograms (kg), and acceleration in meters per

**second**squared ( m/s2 ).13

## What is the velocity?

**Velocity**is a physical vector quantity; both magnitude and direction are needed to define it. The scalar absolute value (magnitude) of

**velocity**is called "speed", being a coherent derived unit whose quantity is measured in the SI (metric system) as metres per second (m/s) or as the SI base unit of (m⋅s

^{−}

^{1}).

14

## How are speed and velocity different?

**Speed**is the distance traveled by an object where as,

**velocity**is distance traveled by an object per unit time in a particular direction.

**Speed**is a scalar quantity where as

**velocity**is a vector quantity.

15

## How do you work out the acceleration?

**The easiest way to do these calculations is to work out the difference between the final velocity and the initial velocity, then divide by the time taken.**

- For example, a car accelerates from 25 m/s to 35 m/s in 5 s.
- Its velocity changes by 10 m/s (35 – 25)
- So its acceleration is 10 ÷ 5 = 2 m/s
^{2}

16

## How do you get the speed of an object?

**Speed**is the rate at which an

**object's**position changes, measured in meters per second. The equation for

**speed**is simple: distance divided by time. If the

**speed**of the

**object**is constant, you'll be able to

**calculate**that constant

**speed**. If the

**speed**is changing, you can find the average

**speed**during the motion.

17

## What do you mean by Escape Velocity?

In physics,

**escape velocity**is the minimum**speed**needed for an object to**escape**from the gravitational influence of a massive body. The**escape velocity**from Earth is about 11.186 km/s (6.951 mi/s; 40,270 km/h; 25,020 mph) at the surface.