Question
What are derived quantities and derived units? State two examples. State the corresponding S.L. and C.G.S. units of the examples.
✓
Answer
- Derived quantities: Physical qUantities other than fundamental quantities which depend on one or more fundamental quantities for their measurements are called derived quantities.
- Derived units: The units of derived quantities which are expressed in terms of fundamental units for their measurements are called derived units.
- Examples and units:
Derived
quantityFormula S.I.
unitC.G.S.
unitVelocity $\frac{\text { Unit of displacement }}{\text { Unit of time }}$ m/s cm/s Acceleration $\frac{\text { Unit of velocity }}{\text { Unit of time }}$ $m / s ^2$ $cm / s ^2$ Momentum Unit of mass
x Unit of velocitykg m/s g cm/s
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Derive the expression for the acceleration due to gravity on the surface of the Earth.
Explain the different types of modulation.
Explain spherical aberration for spherical mirrors. How can it be minimized? Can it be eliminated by some curved mirrors?
A metro train runs from station A to B to C. It takes 4 minutes in travelling from station A to station B. The train halts at station B for 20 s. Then it starts from station B and reaches station C in next 3 minutes. At the start, the train accelerates for 10 sec to reach the constant speed of 72 km/hr. The train moving at the constant speed is brought to rest in 10 sec. at next station.
(i) Plot the velocity- time graph for the train travelling from the station A to B to C.
(ii) Calculate the distance between the stations A, B and C.
(i) Plot the velocity- time graph for the train travelling from the station A to B to C.
(ii) Calculate the distance between the stations A, B and C.
Illustrate with an example how direction of the torque acting on any object is determined.
Explain applications of semiconductors.
Explain, how two vectors are subtracted. Find their resultant by using triangle law of vector addition.
Explain errors in sum and in difference of measured quantity.
Define free body diagram. In the figure given below, draw the free body diagrams for mass of $2 \ kg, 4 \ kg$ and $5 \ kg$ and hence state their force equations.
→Four uniform solid cubes of edges 10 cm, 20 cm, 30 cm and 40 cm are kept on the ground, touching each other in order. Locate centre of mass of their system. [Ans: 65 cm, 17.7 cm]