Question

I don't understand the solution of the above question, the solution i know is :- Accuracy in torque = [M%] + [2 × L%] + [2 × T%]

Which will be equal to 25%
I dont understand why 2 was multiplied to L% and T%?

Answer 1

The multiplication by two in the torque accuracy formula could result from considerations in the experimental setup or error propagation methods, where the effect of measurement error is reflected twice in the system.

Step-by-step explanation:

The student's question seems to relate to calculating the accuracy in torque measurements and why certain percentages are multiplied by two. In physics, especially in problems involving torque calculations, sometimes there are factors that can cause the percentage error to double.

For instance, if a measurement is projected across diametrically opposite points of a circle (which can be thought of as two lever arms in the same system), the effect of the percentage error could be seen twice in the system, hence the multiplication by two.

Each percentage, like L% for lever arm length and T% for torque, might be considered in two places in a calculation. Therefore, the multiplication by two could be a result of a particular approach in the experimental setup or in the propagation of errors in measurements.

The actual reason for doubling L% and T% is often tied to the specifics of the experimental design or the formula derivation that requires this consideration.