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Questions and Answers
What type of quantity is speed?
What type of quantity is speed?
- Base quantity
- Derived quantity
- Vector quantity
- Scalar quantity (correct)
The speed of a body is given by which formula, where s is distance and t is time?
The speed of a body is given by which formula, where s is distance and t is time?
- $v = s \times t$
- $v = t / s$
- $v = s + t$
- $v = s / t$ (correct)
In what units is speed expressed?
In what units is speed expressed?
- Distance minus time
- Time divided by distance
- Distance multiplied by time
- Distance divided by time (correct)
What are the SI units of distance and time, respectively?
What are the SI units of distance and time, respectively?
What is the SI unit of speed?
What is the SI unit of speed?
How is the SI unit of speed written?
How is the SI unit of speed written?
Centimetre per second can be written as:
Centimetre per second can be written as:
In what units are the speeds of fast moving bodies generally expressed?
In what units are the speeds of fast moving bodies generally expressed?
What units are commonly used to express the speed of slow-moving bodies?
What units are commonly used to express the speed of slow-moving bodies?
Flashcards
What is speed?
What is speed?
Speed is a scalar quantity that measures the distance covered by an object in a unit of time.
Speed formula
Speed formula
v = s/t, where v is speed, s is distance, and t is time.
Unit of speed
Unit of speed
Unit of distance divided by unit of time.
SI unit of speed
SI unit of speed
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CGS unit of speed
CGS unit of speed
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Study Notes
- Speed is a scalar quantity that has only magnitude.
- The speed (v) of a body that covers a distance s in time t is given by v = s/t
Units of Speed
- Speed is expressed using distance traveled and time taken.
- The unit of speed depends on the units of distance and time.
- Unit of speed = Unit of distance / Unit of time
- The SI units for distance and time are meter (m) and second (s), respectively.
- SI unit of speed = meter/second = m/s or m s⁻¹
- The SI unit of speed is meter per second.
- The CGS unit of speed is centimeter per second (cm s⁻¹).
- Speed is expressed in units such as:
- Centimeter per second (cm/s or cm s⁻¹)
- Meter per minute (m/min or m min⁻¹)
- Kilometer per hour (km/h or km h⁻¹)
- The speeds of fast-moving objects like cars, scooters, and airplanes are generally expressed in kilometer per hour (km/h).
- The speeds of slow-moving objects are commonly expressed in centimeters per second (cm/s) or meters per minute (m/min).
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