1. State the principle of conservation of linear momentum. 2. What is meant by impulse of force? Write its formula. 3. What is meant by couple? Write any two examples. 4. Define to... 1. State the principle of conservation of linear momentum. 2. What is meant by impulse of force? Write its formula. 3. What is meant by couple? Write any two examples. 4. Define torque and center of mass. 5. A metal ball falls from a height of 1m on a surface and jumps up to a height of y.
Understand the Problem
The question lists various concepts related to physics, such as conservation of momentum, impulse, torque, and examples of physical phenomena involving forces and motion. The goal is to define these concepts and provide relevant examples.
Answer
1. Momentum conserved if no external force. 2. Impulse: \( I = F \Delta t \). 3. Couple: pair of opposite forces. 4. Torque: \( \tau = r \times F \). Center of mass: mass concentration point. 5. Energy changes as ball bounces.
- The principle of conservation of linear momentum states that if no external forces are acting on a system, its total linear momentum remains constant. 2. Impulse of force is the change in momentum, calculated as the product of force and time: ( I = F \Delta t ). 3. A couple is two equal and opposite forces whose lines of action do not coincide. Examples include turning a steering wheel and opening a door. 4. Torque is the rotational equivalent of force, defined as ( \tau = r \times F ) (radius cross force). The center of mass is the point at which the total mass of a system is concentrated. 5. When a metal ball falls and rebounds, its energy is partially conserved depending on height ( y ), showing mechanical energy transformation.
Answer for screen readers
- The principle of conservation of linear momentum states that if no external forces are acting on a system, its total linear momentum remains constant. 2. Impulse of force is the change in momentum, calculated as the product of force and time: ( I = F \Delta t ). 3. A couple is two equal and opposite forces whose lines of action do not coincide. Examples include turning a steering wheel and opening a door. 4. Torque is the rotational equivalent of force, defined as ( \tau = r \times F ) (radius cross force). The center of mass is the point at which the total mass of a system is concentrated. 5. When a metal ball falls and rebounds, its energy is partially conserved depending on height ( y ), showing mechanical energy transformation.
More Information
Conservation of momentum helps predict outcomes in collisions. Impulse explains how forces change motion over time, essential in designs like airbags. Couples create rotation without translation, crucial in mechanical systems. Torque influences rotational dynamics, vital in engines and machinery design.
Tips
Avoid confusing impulse with change in velocity rather than momentum. Ensure torque is calculated with correct perpendicular distance from pivot.
Sources
- Law Of Conservation Of Linear Momentum - BYJU'S - byjus.com
- 8.1 Linear Momentum, Force, and Impulse - Physics | OpenStax - openstax.org
- Conservation of Momentum | Physics - Lumen Learning - courses.lumenlearning.com
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