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Units And Measurement

Question
CBSEENPH11020589
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ABC is an equilateral triangle with O as its centre F1, F2 and F3 represent three forces acting on the sides AB, BC and AC respectively. If the total torque about O zero then the magnitude of F3 is

  • F1 +F2

  • F1 - F2

  • F1 +F2/2

  • 2(F1 +F2)

Solution

A.

F1 +F2

If we take clockwise torque
straight tau space equals space straight tau subscript straight F subscript 1 end subscript plus space straight tau subscript straight F subscript 2 end subscript plus space straight tau subscript straight F subscript 3 end subscript 0 equals straight F subscript 1 straight r space plus straight F subscript 2 straight r plus straight F subscript 3 straight r straight F subscript 3 space equals space straight F subscript 1 plus straight F subscript 2

Some More Questions From Units and Measurement Chapter

Does the numerical factor in the quantitative measurement depend on the system of unit used?

Is one unit sufficient to measure a physical quantity?

Can a physical quantity have two or more units? Give example.

What are fundamental quantities?

How many fundamental quantities are there in mechanics?

How many fundamental quantities are there in Physics?

Name the fundamental quantities of mechanics.

Name the different system of units in mechanics that are internationally accepted.

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