peshës

Peshë, in Albanian usage, refers to the weight of an object — the force exerted by gravity on that object. In physics, weight is defined as the gravitational force acting on a body with mass m. Because weight depends on gravity, it can vary with location, while mass remains constant.

The relation is written as W = m g, where g is the local acceleration due to gravity. On Earth, g is about 9.81 m/s^2, so an object with a mass of 70 kg has a weight of roughly 686 newtons. The SI unit of weight is the newton; kilograms are units of mass, not weight, though everyday language often uses kilograms as a proxy for weight.

Measurement of weight is performed with devices such as spring scales or load cells that respond to force. Balances measure mass by comparing gravitational forces. In everyday life, scales commonly display results in kilograms or pounds, reflecting mass, even though the device is detecting a force and, on Earth, that force is commonly interpreted as weight.

Weight varies with gravity: on the Moon, where g is about 1.62 m/s^2, the same 70 kg mass would weigh roughly 114 newtons. In space, in free fall, weight is effectively zero even though mass remains unchanged. The distinction between mass and weight is central in physics, engineering, and everyday discussion, and it is important for understanding measurements, design, and applications across different gravitational environments.