Science & Society

 In physics, work is defined as the product of force and displacement in the direction of the force. Mathematically, it's represented as: W=Fd Where: - \( W \) = Work done - \( F \) = Force applied - \( d \) = Displacement - \( \theta \) = Angle between the force vector and the displacement vector

What are geo stationary satellites? Geostationary satellites, also known as geosynchronous equatorial orbit (GEO) satellites, are satellites that orbit the Earth at the same rate as the Earth rotates, allowing them to remain fixed relative to a specific point on the Earth's surface. This means that they appear to be stationary when observed from the ground. Geostationary satellites are typically positioned at an altitude of approximately 35,786 kilometers (22,236 miles) above the Earth's equator. They are commonly used for telecommunications, broadcasting, weather monitoring, and other applications that require a constant connection to a specific geographic location on the Earth's surface.

What is GPS?  GPS stands for Global Positioning System. It is a satellite-based navigation system that provides location and time information anywhere on or near the Earth's surface. GPS works by using a network of satellites that continuously transmit signals to GPS receivers on the ground, allowing these receivers to calculate their precise location, speed, and time. It is widely used in various applications such as navigation, mapping, surveying, and timing synchronization.

 What is gravitational field strength? Gravitational field strength, often denoted by 'g', is a measure of the gravitational force experienced by a unit mass at a given point in space. It represents the force per unit mass experienced by an object placed at that point. Gravitational field strength is usually expressed in units of acceleration, such as meters per second squared (m/s^2). At the surface of the Earth, the gravitational field strength is approximately 9.8 m/s^2. Define orbital velocity  Orbital velocity is the velocity required by an object to remain in a stable orbit around another object, such as a planet or a star. It is the velocity at which the gravitational force pulling the object inward is balanced by the centrifugal force pushing the object outward, resulting in a circular or elliptical path around the larger body. The orbital velocity depends on the mass of the larger body and the distance from its center.

 What is law of gravitation? The law of gravitation, formulated by Sir Isaac Newton, states that every mass attracts every other mass in the universe with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers. Mathematically, it is expressed as  F = G  (m1m2) / r^2,  where F is the gravitational force, G is the gravitational constant, m1 and m2 are the masses of the two objects, and r is the distance between their centers. Define gravitation Gravitation is the natural phenomenon by which all objects with mass are brought toward each other. It is the force of attraction between two objects due to their mass, as described by Isaac Newton's law of universal gravitation.

  A girl is pulling a baby cart through 35 m applying a force of 150 N. Find the work done by the girl. To find the work done by the girl in pulling the baby cart through 35 meters, we can use the formula for work: W= Fd Where: - Work is the amount of energy transferred by a force when it moves an object through a distance. - Force is the applied force (in newtons, N). - Distance is the distance over which the force is applied (in meters, m). Given that the force applied by the girl is 150 N and the distance is 35 m, we can plug these values into the formula: Work = 150x35 Work = 5250 So, the work done by the girl in pulling the baby cart through 35 meters is 5250J