Question

which one is not derived unit
a) pressure
b)force
c)time
d) energy

Answer 1

Hey!
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=> What are derived units ?

→The units that are obtained from the basic units either by dividing or multiplying them are called derived units .


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a.) Pressure = Force / Area


=> N/m²


•°• It's a derived unit.


b) Force = Mass × Acceleration

=> Kg × m/s² or N

•°• It's a derived unit.


c.) Time

=> It is basic fundamental quantity . It's unit is Seconds ( S)


d. ) energy = ½mv² or mgh

•°• This is also a derived unit !!


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★Thus, it's clear that Option ( c ) Time is the answer !!

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Answer 2

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➻The collision of the particles with the walls of the vessels give rise to the pressure of the gas.