Table of Contents
In this article, we will learn about a few important attributes, their units, and conversion methods between the different units.
Learn about the Conversion of Units of Speed, Acceleration, and Time. m/s to km/h, km/h to mi/h, m/s2 to km/s2, hr to seconds, etc. with examples. Here is a downloadable PDF to explore more.
Length, Area & Volume Unit Conversion
How long is a meter
Speed is defined as the rate at which an object is moving (covering a particular distance). It is a scalar quantity as it defines only the magnitude and not direction.
The SI derived unit for speed is meter per second (m/s).
Velocity is defined as the rate of change of an object’s position with respect to a frame of reference.
Velocity is a vector quantity as it describes both the magnitude and direction.
The SI derived unit for velocity is meter per second (m/s).
Acceleration is also a vector quantity and is defined as the rate of change of velocity with change in time.
The SI derived unit for acceleration is meter per second squared (m/s2).
A measurable period during which an action/event happens is Time.
The SI derived unit for Time is seconds (s).
International system of units is the modern form of the Metric system. The units listed in this system are used as the standard units of measurements in almost every country in the world.
In this section we will look at different units used to measure Time and the conversion formulae needed to convert a value from one unit to another.
In this section, we will see various formulae for the conversion of values between different unit representations for speed/Velocity.
In general, the method used to arrive at the formula is based on the individual units in the numerator and the denominator.
where 2 × π × r = Linear Velocity
Mach is the ratio of the speed of a moving object through a fluid to the speed of sound in the same medium. Since it is a ratio, it does not have any dimension.
The speed of the sound is not constant. It varies depending on the temperature and the atmospheric pressure.
In this section, we will see various formulae for the conversion between different unit representations for acceleration.
1 Gal = 1 centimeter/second2
In this section we are going to see some examples for unit conversions.
Convert a speed of 90 meters per second to kilometer per hour
To convert a value from m/s to km/hr, we need to multiply it by 3.6
So, 90 m/s = 90 × 3.6 = 324 km/hr
Convert a speed of 10 feet per second to meters per second
To convert a value from ft/s to m/s, we need to multiply it by 0.3048
So, 10 ft/s = 10 × 0.3048 = 3.048 m/s
Convert a velocity of 25 mph to feet per second
To convert a value from miles/hr to feet/sec, we need to multiply it by 1.47
So, 25 mph = 25 × 1.47 = 36.7 ft/s
Convert an acceleration of 120 metre per second squared to kilometre per hour squared
To convert a value from meter/sec2 to kilometre/ hr2, we need to multiply it by 12960
So, 120 m/s2 = 120 × 12960 = 15,55,200 km/hr2
Convert 58 Gal into kilometer per hour squared
To convert a value from Gal to kilometre/ hr2, we need to multiply it by 129.6
So, 58 Gal = 58 × 129.6 = 7516.8 km/hr2
How many minutes are there in 4 days?
Hours in a day = 24
Hours in 4 days = 24 × 4 = 96
Minutes in 1 hour = 60
So, minutes in 96 hours = 96 × 60 = 5760
How many seconds are there in one week?
Number of days in 1 week = 7
Number of hours in a day = 24
Number of minutes in 1 hour = 60
Number of seconds in 1 minute = 60
So, number of seconds in 1 week = 60 × 60 × 24 × 7 = 604800
In this article, we learnt about Time, Speed, Velocity and Acceleration. We learnt their definitions, units and the conversion rules/formulae between different units.
This may serve as a quick reference guide for any of the concepts mentioned above.
Written by Gayathri Sivasubramanian, Cuemath Teacher
Number of days in a year (12 months) = 365 (366 once every 4 years)
Number of days in a year (6 months) = 365/2 = 182.5
Number of days in a week = 7
So, the number of weeks in 6 months = 182.5/7 = 26.07 (approximately 26 weeks)
Both speed and velocity are the ratio of the distance moved by an object to the time taken for the movement.
But Speed is a Scalar quantity. It considers only magnitude irrespective of the direction.
Whereas velocity is a Vector quantity and it represents both magnitude and direction.
Acceleration is the rate of change of speed. It denotes the change of speed with respect to time.
Number of seconds in a minute = 60
Number of minutes in an hour = 60
So, number of seconds in an hour = 60 × 60 = 3600
So, number of minutes in a day = 60 × 24 = 1440