FreeNotes
Orbital velocity is the speed at which an object must travel to maintain a stable orbit around a planet or other celestial body. The orbital velocity depends on the mass of the central body (such as Earth) and the altitude of the orbit. Orbital Velocity Formula: The orbital velocity vo for an object in a … Read more
Centripetal force is not a specific type of force; instead, it is the resultant force that causes an object to follow a circular path. Several forces can act as sources of centripetal force in different scenarios: Gravitational Force: Example: The Earth’s gravity provides the centripetal force for the Moon’s orbit around the Earth. The Sun’s … Read more
Centripetal Force is the force that acts on an object moving in a circular path, directed towards the center of the circle (or axis of rotation). It is not a new type of force in itself, but rather a result of other forces (such as tension, gravity, or friction) that cause the circular motion. Characteristics … Read more
Analyze the dynamics of an object reaching terminal velocity. When an object falls freely towards Earth, it is initially accelerated by gravity. However, as it gains speed, the resistance from air (air resistance or drag) also increases. Stages of Falling: Initial Free Fall: In the initial stage, when the object is first released, the force … Read more
Rolling friction occurs when an object rolls over a surface, such as a wheel or a ball. It involves less resistance compared to sliding friction because the contact area is smaller. Sliding friction occurs when an object slides over a surface, and the frictional force is higher due to the larger contact area and interlocking … Read more
Friction is the resistive force that opposes the relative motion between two surfaces in contact. Causes of friction: Friction arises due to the irregularities and microscopic asperities on the surfaces of the materials in contact. These microscopic bumps and ridges interlock, creating resistance to motion. Advantages of friction: It allows us to walk without slipping. … Read more
To improve the stability of an object: Lower the center of gravity: An object with a lower center of gravity is more stable. This is why cars and buildings are designed with low centers of gravity to prevent tipping. Increase the base of support: A wider base provides more stability. For example, a tripod has … Read more
Equilibrium refers to a state in which an object remains at rest or in uniform motion, without any net force or torque acting on it. Conditions of equilibrium: Translational equilibrium: The vector sum of all forces acting on the body must be zero. This means that the forces in all directions (both horizontally and vertically) … Read more
To find the center of gravity of an irregularly shaped thin sheet of plastic, follow these steps: Suspend the plastic sheet from a point and allow it to come to rest. Draw a vertical line from the point of suspension. This line represents the direction of the force of gravity acting on the sheet. Repeat … Read more
The center of gravity is the point in a body where the total weight of the body can be considered to act. It is the point where the gravitational force can be considered to act for the purpose of analyzing motion under the influence of gravity. Location of center of gravity for various bodies: Circular … Read more