Write a short note on electronic balance.

A spring balance used for measuring the minimum force required to pull a block is of range $0-2 \mathrm{kg} \mathrm{wt}$. It has total $100$ divisions. Find the least count of the spring balance.

Look at the diagram below and answer the following questions:

(a) When a force is applied through the free end of the spring balance $\mathrm{A}$, the reading of the spring balance $\mathrm{A}$ is $15 \mathrm{g} \mathrm{wt}$. What will be the reading shown by spring balance $\mathrm{B}$?

(b) Write reasons for your answers.

(c) Name the force which balance $\mathrm{A}$ exerts on balance $\mathrm{B}$ and the force of balance $\mathrm{B}$ on balance $\mathrm{A}$.

Write the quadrants in which the following points lie:

$\left(-4,7\right)$

A spring balance used for measuring the minimum force required to pull a block is of range $0-2 \mathrm{kg} \mathrm{wt}$. It has total $100$ divisions. A measurement by this spring balance shows the pointer to be on the ${25}^{\mathrm{th}}$ division. What is the reading of the spring balance?

Show how Abdu will use these stone pieces to weigh $3 \mathrm{kg}$ of firewood

For doing the experiment "to study the third law of motion using two spring balances", four students A, B, C and D set up their apparatus as shown below. The best setup is that of student.

(A) 

(B) 

(C) 

(D) 

Show how Abdu will use these stone pieces to weigh $4 \mathrm{kg}$ of firewood.

Now, you show how Abdu will use these stone pieces to weigh $7 \mathrm{kg}$ of firewood.