FreeNotes
Solve the following questions. 1. Calculate the torque acting on a spanner of length 20 cm used to loosen a nut with a force of 50 N. If the same nut is to be loosened by a force of 100 N, what should be the length of the spanner? (Ans. 10 Nm and 10 cm) … Read more
Spreading arms increases the moment of inertia, making it easier to control balance by redistributing weight and reducing the chances of falling. Related Questions: Why door knobs are fixed at the edge of door? What will happen it the door knob is at the middle of the door? If you drop a feather and a … Read more
A low center of gravity increases a car’s stability and reduces the risk of overturning while making sharp turns at high speeds. It also improves handling and balance. Related Questions: Why door knobs are fixed at the edge of door? What will happen it the door knob is at the middle of the door? If … Read more
When climbing uphill, we lean forward to keep our center of gravity over our feet, preventing us from falling backward. While going downhill, we lean backward to counterbalance the forward pull of gravity, maintaining stability. Related Questions: Why door knobs are fixed at the edge of door? What will happen it the door knob is … Read more
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