Materials Required:

Wooden block and spring balance of 5 N.

Procedure in a real lab:

1. A wooden block with a hook is placed on a table.
2. Note down the least count of the spring balance.
3. The spring balance is attached to the hook.
4. Hold the spring in such a way that the reading displayed in the spring balance can be noted down without any parallax error.
5. The applied force on the spring balance is gradually increased until it just starts to move.
6. The reading of the spring balance is noted.

Procedure using simulator:

1. From the combo box, select Environment, where the experiment to be carried out.
2. Note down the least count of the spring balance.
3. The user can increase the mass of the block by changing the slider ‘mass of the block’.
4. The user can also change the roughness of the table by changing the ‘Roughness of the table’ slider.
5. Apply force on the spring balance by changing the ‘Apply force in Newton’ slider.
6. The ‘Reset’ button can be used to reset the experiment to its initial state.

Observation:

Least count of the spring balance = value of 1 small division = …….g.wt

As the mass of the block increases the force required to move the block is also increases.

Result:

Force applied to just move the block is directly proportional to the mass of the block.

ie, F ∝ M

Precautions:

1. A suitable spring balance to pull the block must be used.
2. The spring balance should be brought in elastic mode before doing the experiment.
3. The reading of the spring balance should be taken without any parallax error.
4. A smooth table or surface must be used.