FreeNotes
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
The center of mass is the point in a body or system where the total mass of the body can be considered to be concentrated. It is the weighted average of the positions of all the particles that make up the body, weighted by their masses. Effect of mass distribution: If the mass of the … Read more
Parallel forces are forces that act along parallel lines of action. These forces can be classified into two types: like parallel forces and unlike parallel forces. Like Parallel Forces: These are forces that act in the same direction along parallel lines. When the forces are like parallel forces, their resultant force is the sum of … Read more
Communication satellites in geostationary orbit must maintain a specific speed to match the Earth’s rotational period (24 hours). This ensures that they remain fixed relative to a specific location on Earth, allowing continuous communication coverage. If the speed changes, the satellite may drift out of position, disrupting communication signals. Related Questions: Why door knobs are … Read more
As the ball swings in a circular motion, the tension in the string varies. It is maximum at the lowest point of the swing due to the combination of gravitational force and the required centripetal force. At the highest point, the tension is lower because gravity partially contributes to the required centripetal force. The forces … Read more
If a driver takes a curve too fast, the car may skid off the road due to insufficient centripetal force. Centripetal force is required to keep the car moving in a circular path. If the speed is too high, the available friction between the tyres and the road may not provide enough centripetal force, causing … Read more
A pencil standing on its tip is unstable because its center of gravity is high and has a very small base of support. Small disturbances can easily shift its center of mass outside the base, causing it to topple. Stability depends on the object’s height, base width, and the position of its center of mass. … Read more