A Newton meter is just any device that measures force (it’s called a “Newton meter” because a “Newton” is a unit of force). A spring balance is a device that measures force by measuring how much a string stretches when a force is applied to it.

Work can be calculated with the equation: Work = Force × Distance. The SI unit for work is the joule (J), or Newton • meter (N • m). One joule equals the amount of work that is done when 1 N of force moves an object over a distance of 1 m.

One newton is the force needed to accelerate one kilogram of mass at the rate of one metre per second squared in the direction of the applied force. The newton thus became the standard unit of force in the Système international d’unités (SI), or International System of Units. The newton is named after Isaac Newton.

Note that one joule of work is done when a force of one newton causes a movement of one metre. This means that work done can also be measured in newton-metres (Nm). It is important not to confuse newton-metres (a unit of work done) with Newton meters (calibrated spring balances used to measure weights).

Work is a scalar quantity, so it has only magnitude and no direction. Work transfers energy from one place to another, or one form to another. The SI unit of work is the joule (J), the same unit as for energy….Work (physics)

When force and displacement are in the same direction, the work performed on an object is said to be positive work. Example: When a body moves on the horizontal surface, force and displacement act in the forward path. The work is done in this case known as Positive work.

The negative sign associated with PV work done indicates that the system loses energy. If the volume increases at constant pressure (ΔV > 0), the work done by the system is negative, indicating that a system has lost energy by performing work on its surroundings.

Therefore, as two massive objects move towards each other, the motion accelerates under gravity causing an increase in the (positive) kinetic energy of the system and an increase of the same amount in the (negative) gravitational potential energy.

The reason for this is that negative events have a greater impact on our brains than positive ones. Psychologists refer to this as the negative bias (also called the negativity bias), and it can have a powerful effect on your behavior, your decisions, and even your relationships.

A positive energy balance, in which energy intake exceeds expenditure causes weight gain, with 60–80 % of the resulting weight gain being attributable to body fat. In negative energy balance, when energy expenditure exceeds intake, the resulting loss in body mass is also accounted for by 60–80 % body fat.

“Energy in” is the energy you put into your body in the form of calories from foods and beverages. “Energy out” is the calories you burn for basic bodily functions such as your heart beating or breathing and from physical activity.

Energy balance is important. When you consume too much energy and burn too little, your body stores that excess energy as body fat. Energy balance is important. When you consume too much energy and burn too little, your body stores that excess energy as body fat.

Energy Balance in Real Life

1. Drink water instead of a 12-ounce regular soda.
2. Order a small serving of French fries instead of a medium , or order a salad with dressing on the side instead.
3. Eat an egg-white omelet (with three eggs), instead of whole eggs.
4. Use tuna canned in water (6-ounce can), instead of oil.

Heating and cooling our homes, lighting office buildings, driving cars and moving freight, and manufacturing the products we rely on in our daily lives are all functions that require energy.

There are three main groups of factors—homoeostatic, environmental and behavioural processes—that interact and influence steady-state body weight. Alterations in any of these factors will result in changes to this steady-state and could result in obesity.

Eating a balanced diet This means eating a wide variety of foods in the right proportions, and consuming the right amount of food and drink to achieve and maintain a healthy body weight.

A balanced diet

• vegetables and legumes (beans)
• fruit.
• grains and cereals.
• lean meat, poultry, fish, eggs, legumes (beans) tofu, nuts, seeds.
• milk, cheese, yoghurt or alternatives.

Winners for 2020: Best Overall: The Mediterranean diet took first place, followed by: The flexitarian (mostly plant-based) and DASH diets tying for second place. WW (formerly Weight Watchers) in fourth place.

Eat these foods daily (or at least often)

• Salmon. This oily fish, known for its bright pink color, is rich not only in healthy protein but also in omega-3 fatty acids, which benefit both your heart and your brain.
• Brussels sprouts.
• Blueberries.
• Nuts.
• Plain yogurt.