Question

You are provided with a knife-edge, a uniform meter ruler, and a 0.1 N weight. Describe how you would find the weight of the ruler without using any other apparatus. Explain clearly how you would calculate the final result from your measurements.

A) Place the ruler on the knife-edge and balance it with the weight hanging off the edge. Measure the length from the knife-edge to the balance point. Using the balance point and the known weight, calculate the weight of the ruler.

B) Hang the ruler horizontally from a support and attach the weight at one end. Measure the angle the ruler makes with the horizontal. Using trigonometric functions, calculate the weight of the ruler.

C) Suspend the ruler vertically from a support and attach the weight at the bottom. Measure the angle the ruler makes with the vertical. Using trigonometric functions, calculate the weight of the ruler.

D) Place the ruler on a flat surface and stack known weights on one end until the ruler lifts off the surface. Count the number of weights required to lift the ruler and calculate the weight of the ruler.

Answer 1

To find the weight of the ruler without using any other apparatus, stack known weights on one end until the ruler lifts off the surface and calculate the weight.

Step-by-step explanation:

To find the weight of the ruler without using any other apparatus, you can follow the method described in option D. Place the ruler on a flat surface and stack known weights on one end until the ruler lifts off the surface. Count the number of weights required to lift the ruler, and calculate the weight of the ruler.

For example, if it takes 5 known weights of 0.1 N each to lift the ruler, the weight of the ruler would be 5 x 0.1 N = 0.5 N.

By using this method, you can determine the weight of the ruler accurately by measuring the number of weights required to lift it.