Question

a half meter ruler is pivoted at its midpoint and balances whaen a weight of 20N is placed at the 10 cm mark and a weight W is placed at the 45 cm mark on the ruleer. Calculate the weight W

Answer 1

The weight W palced at a distance of 45 cm on a half meter ruler pivote at its midpoint is 15 N.

To calculate the weight W, we use the principle of moment.

Principle of moment?

It states that, if a body is at equilibrium, the sum of clockwise moment is equal to the sum of anticlockwise moment.

From the question,

Clockwise moment (F×d ) = Anticlockwise moment (W×D).......... Equation1

Make W the subject of the equation

• W = Fd/D............. Equation 2

Given:

• F = 20 N
• d = (25-10) = 15 cm = 0.15 m
• D = (45-25) = 20 cm = 0.2 m

Substitute these values into equation 2

• W = 20×0.15/0.2
• W = 15 N

Hence, the weight W is 15 N

Learn more about principle of moment here: https://brainly.com/question/21945515

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