# Q-1: Weight of Body on False Balance Q-2: Maximizing Energy in Swimming

• shobhitdimple
In summary, a false balance is a device used to measure weight by comparing an object to known weights. It works by using a horizontal beam with a fulcrum and two pans. Weight is a measure of the force acting on an object due to gravity, while mass is a measure of the amount of matter in an object. To maximize energy while swimming, proper technique and form, as well as training, are important. To increase energy efficiency while swimming, using efficient strokes, minimizing resistance, maintaining a consistent pace, and proper nutrition and hydration are key.
shobhitdimple
Q-1 : A bodu weighs 8 gm when placed in one pan and 18 when placed on a other pan of a false balance . If the beam is horizontal when both the pans are empty , the true weight of the body is

Q-2 : when one swims across a river max. energy is spent in second 1/3 of the distance why ?

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Q-1: The true weight of the body can be calculated by using the principle of moments. Since the beam of the balance is horizontal when both pans are empty, it means that the moments on both sides are equal. Therefore, we can set up an equation using the moments on each side and solve for the unknown weight of the body.

Q-2: When swimming across a river, the maximum energy is spent in the second 1/3 of the distance because this is when the swimmer is facing the most resistance from the water. In the beginning, the swimmer is building up momentum and in the final 1/3 of the distance, the swimmer is slowing down due to fatigue. Therefore, the middle 1/3 of the distance requires the most effort and energy to overcome the resistance of the water. Additionally, this is when the swimmer is moving against the current of the river, which adds to the resistance and requires even more energy expenditure.

## Q1: What is a false balance?

A false balance is a device used to measure the weight of an object by comparing it to known weights. It consists of a horizontal beam with a fulcrum in the center and two pans hanging from either end.

## Q2: How does a false balance work?

A false balance works by placing the object being weighed in one pan and known weights in the other pan. The beam will tilt towards the heavier side, and the weight can be determined by adjusting the known weights until the beam is level.

## Q3: What is the difference between weight and mass?

Weight is a measure of the force acting on an object due to gravity, while mass is a measure of the amount of matter in an object. Weight can vary depending on the strength of gravity, while mass remains constant.

## Q4: How can energy be maximized while swimming?

To maximize energy while swimming, proper technique and form are essential. This includes maintaining a streamlined body position, using efficient strokes, and coordinating breathing with movements. Training and building endurance can also help to maximize energy output during swimming.

## Q5: What are some ways to increase energy efficiency while swimming?

Some ways to increase energy efficiency while swimming include using efficient strokes, minimizing resistance in the water, maintaining a consistent pace, and taking breaks when needed. Proper nutrition and hydration are also important for maintaining energy levels during swimming.

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