Explain the 2nd law of Motion , Linear Momentum and Impulse with reference to the picture given below . Please explain it in 1 thread . it will be a great help ... Thnx !!
Dear Student,
Second law of motion: Newton’s second law of motion states that “The rate of change of momentum of the body is directly proportional to the applied force and takes place in the direction in which the force acts” Mathematically: F = dp/dt, where p is the momentum, defined as mass times the acceleration i.e. p = ma Explanation: It says that whenever there is time rate of change of the momentum of the body it is because of the force applied and the effect takes place in the direction of the applied force. Examples of Newton’s second law of motion: • The motion of a cricket ball after being hit by a bat • Pushing a car to start the engine • Objects falling under gravity • The difficulty you face while pushing or pulling a heavier box compared to a lighter box is explained by the 2nd law of motion. Linear momentum: Momentum is defined as motion contained in a body. It is the product of mass and it's velocity. It is a vector quantity which has direction and magnitude. It's a conserved quantity, when there is no external force, which means that the total momentum of a system is constant. The momentum of a body is the product of its mass (m) and its velocity (v), i.e. p=mv. SI unit of momentum = kg m/s or we can write kgms/s² = Ns (1N = 1 kgm/s²) Impulse: Impulse of a force is defined as the measure of total effect of the force. Impulse= average force x time It is a vector quantity. Example: A cricket player draws in his hands backward in the act of catching the ball.Thus he allows a longer time for his hands to stop the ball. As impulse= force x time = change in linear momentum therefore by increasing the time of a catch the player has to apply a smaller force against the ball in order to stop it.The ball in turn exerts a smaller force on his hands and his hands are not injured. Regards
Second law of motion: Newton’s second law of motion states that “The rate of change of momentum of the body is directly proportional to the applied force and takes place in the direction in which the force acts” Mathematically: F = dp/dt, where p is the momentum, defined as mass times the acceleration i.e. p = ma Explanation: It says that whenever there is time rate of change of the momentum of the body it is because of the force applied and the effect takes place in the direction of the applied force. Examples of Newton’s second law of motion: • The motion of a cricket ball after being hit by a bat • Pushing a car to start the engine • Objects falling under gravity • The difficulty you face while pushing or pulling a heavier box compared to a lighter box is explained by the 2nd law of motion. Linear momentum: Momentum is defined as motion contained in a body. It is the product of mass and it's velocity. It is a vector quantity which has direction and magnitude. It's a conserved quantity, when there is no external force, which means that the total momentum of a system is constant. The momentum of a body is the product of its mass (m) and its velocity (v), i.e. p=mv. SI unit of momentum = kg m/s or we can write kgms/s² = Ns (1N = 1 kgm/s²) Impulse: Impulse of a force is defined as the measure of total effect of the force. Impulse= average force x time It is a vector quantity. Example: A cricket player draws in his hands backward in the act of catching the ball.Thus he allows a longer time for his hands to stop the ball. As impulse= force x time = change in linear momentum therefore by increasing the time of a catch the player has to apply a smaller force against the ball in order to stop it.The ball in turn exerts a smaller force on his hands and his hands are not injured. Regards