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Units And Measurement

Question

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A motor delivers 0.25hp when its shaft is running at the rate 1400 rpm. Find the torque acting on the shaft.

Solution

Here, we have
Velocity, w=1400 rpm = 146.67 rad/s
Power, P=0.25 hp = 0.25x746W=186.5W
We know, P= $straight omega space straight tau$
$therefore space space space space straight tau equals straight P over straight ϖ equals fraction numerator 186.5 over denominator 146.67 end fraction equals 1.27 Nm$

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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