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Linear Momentum 2

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Published in: Physics
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Impulse and impulsive force

Elizabeth C / Kochi

13 years of teaching experience

Qualification: M.Sc. & B.Ed.

Teaches: Physics, Chemistry

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  1. N/A
  2. Recall o What is momentum(define), its Sl unit? o Momentum —force relationship o State Law of conservation of linear momentum o Types of collisions ,characteristics and
  3. TYPES OF COLLISIONS ' Total linear momentum is conserved at each instant of every collision ' Total energy is conserved in all collisions. The total kinetic energy may or may not be conserved during a collision. ' Even for an elastic collision, the kinetic energy conservation holds after collision is over and does not hold at every instant of the collision. When two bodies collide; they get deformed and may be momentarily at rest with respect to each other. The impact and deformation during collision may convert part of the initial kinetic energy into heat and sound.
  4. Due to the application of force momentum can change, and a change in momentum is known as an impulse the vector quantity impulse is represented by a capital letter J, ' since it's a change in momentum, its units are the same as those for momentum, [kgm/ s], and can also be written as a newton-second [NS].
  5. Impulse-Momentum Theorem ' Since momentum is equal to mass times velocity, you can write that p = mv. Since you also know impulse is a change in momentum, impulse can be written as J = Ape Combining these equations, you find: . J = Ap = FAt it is called impulse momentum theorem
  6. Impulsive force ' Avery large force acting for a short time is called impulsive force Eg hitting a nail with hammer Striking a tennis ball with racket
  7. o problems

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