**Upstream and Downstream – Formula**

- Upstream = (u−v) km/hr, where “u” is the speed of the boat in still water and “v” is the speed of the stream.
- Downstream = (u+v)Km/hr, where “u” is the speed of the boat in still water and “v” is the speed of the stream.
- Speed of Boat in Still Water = ½ (Downstream Speed + Upstream Speed)

## How do you calculate the hull speed of a boat?

Theoretical displacement hull speed is calculated by the formula: **velocity in knots = 1.35 x the square root of the waterline length in feet**.

## How fast will a 150hp boat go?

fiberglass bass boat powered by a 150-hp outboard will have a WOT speed in the **50-mph** range, and will have its most economical cruise in the mid-30s with two people aboard.

## How do you calculate speed rate?

To work out speed, divide the distance of the journey by the time it took to travel, so **speed = distance divided by time**. To calculate time, divide the distance by speed.

**How do you calculate speed and speed of a boat? – Related Questions**

## What two measurements are necessary for calculating speed?

Speed is calculated by using the formula, speed= distance/time. Let us see which two units of measurement are necessary for describing the speed. **The SI unit of distance is the meter and the SI unit of time is second**. So, the SI unit of speed is meter per second.

## What are 3 ways to measure speed?

These include **miles per hour (MPH), kilometers per hour (kph or km/h), and meters per second (m/s)**. How can you measure the speed of a moving cart? This car speedometer shows speed in miles per hour and in kilometers per hour.

## What are 3 examples of a speed measurement?

An object’s speed is the total distance it travels in a certain amount of time. Units of speed include **miles per hour (mph), centimeters per second (cm/sec or cm/s), meters per second (m/sec or m/s), or kilometers per hour (kph or km/hr)**.

## What is the most common measurement for speed?

Speed in **kilometers per hour** (km/h)

Kilometers per hour is often used for car speeds. One hour at this speed moves you 100 km. Example: One minute at 60 km/h moves you 1 km.

## Whats the difference between velocity and speed?

**Speed is the time rate at which an object is moving along a path, while velocity is the rate and direction of an object’s movement**. Put another way, speed is a scalar value, while velocity is a vector.

## What is the correct unit for speed?

unit of speed is the **meter per second** (m/s).

## What is the basic unit of speed?

So speed can be expressed in all the given units, but basic unit is **ms**.

## What are the four types of speed?

**There are four types of speed and they are:**

- Uniform speed.
- Variable speed.
- Average speed.
- Instantaneous speed.

## What are the 4 units of speed?

**metres per second (symbol m s**^{−}^{1} or m/s), the SI derived unit; **kilometres per hour (symbol km/h);** **miles per hour (symbol mi/h or mph);** **knots (nautical miles per hour, symbol kn or kt);**

## What are the two types of speed?

**Velocity and agility**: the two kinds of speed.

## What are 3 facts about speed?

Interesting Facts about Speed and Velocity

**The first scientist to measure speed as distance over time was Galileo**. A speedometer is a great example of instantaneous speed. The speed of light can also be written as 186,282 miles per second. The speed of sound in dry air is 343.2 meters per second.

## What is speed write its formula?

The general speed formula for an object is given as [**Speed = Distance ÷ Time**]. SI units of speed is m/s.

## What is 2x speed?

Speed watching is the act of watching videos at faster playback speeds than normal. On YouTube and with programs like VLC, you can do this by selecting your own speed of playback. While 1x speed would play a video at normal speed, 2x speed would **play a video twice as quickly and thus save you half the time**.

## What are 2 examples of average speed?

To find the average speed we need the total distance and the total time. Answer: Average speed of Sam is 45 km/hr. Example 2: **A train is moving with a speed of 80 miles per hour for the first 4 hours and 110 miles per hour for the next 3 hours.**

## What is speed and types of speed?

Speed is the distance traveled per unit of time. It is how fast an object is moving. speed=distance travelled /time taken. unit of speed = m/sec. Speed is a scalar quantity that is the magnitude of the velocity vector.

## What is the second name of speed?

Some common synonyms of speed are **dispatch, expedition, haste, and hurry**. While all these words mean “quickness in movement or action,” speed suggests swift efficiency in movement or action.