Linear impuls and momentum

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  • J = 8.00 N  s
  • Linear impuls and momentum

    1. 1. LINEAR IMPULSE AND MOMENTUMME113022 ZOHAIB AHMADME11300 SAQIB AMIRME11300 M TAHAME11300 M RAMZAN
    2. 2. Impulse and MomentumASTRONAUT Edward H. White II is in thezero gravity of space. By firing the gas-powered gun, he gains momentum andmaneuverability. Credit: NASA ZOHAIB AHMAD MAJU ISLAMABAD
    3. 3. Momentum Defined ZOHAIB AHMAD MAJU ISLAMABAD
    4. 4. Conservation of Linear MomentumThe total linear momentum of a system ofobjects is constant if the net force acting on asystem is zero.Momentumis conservedin this rocket launch.The velocity of therocket and its payload isdetermined by the mass and velocity of the expelled gases. Photo: NASA ZOHAIB AHMAD MAJU ISLAMABAD
    5. 5. Conservation of Momentum ZOHAIB AHMAD MAJU ISLAMABAD
    6. 6. Conservation of Linear Momentum ZOHAIB AHMAD MAJU ISLAMABAD
    7. 7. Collision Classifications• Collisions are classified according to whether the kinetic energy changes during the collision.• The two classifications are elastic and inelastic.• In an elastic collision the total kinetic energy of the system is the same before and after the collision.• In an a perfectly inelastic collision the total kinetic energy is still conserved but the two objects stick together and move with the same velocity. ZOHAIB AHMAD MAJU ISLAMABAD
    8. 8. Conservation of Linear Momentum ZOHAIB AHMAD MAJU ISLAMABAD
    9. 9. Two billiard balls collide in aperfectly elastic collision. Ball Ahas a mass of 0.8 kg and aninitial velocity (u A) of 3 m/s, ballB has a mass of 0.3 kg and aninitial velocity (u B) of −2 m/s,determine the velocity of eachball after the collision. ZOHAIB AHMAD MAJU ISLAMABAD
    10. 10. Two clay objects collide in aninelastic collision, object Ahas a mass of 0.8 kg and aninitialvelocity (u A) of 4 m/s, objectB has a mass of 0.4 kg andan initial velocity (u B) of −2m/s, determine the finalvelocity of A and B. ZOHAIB AHMAD MAJU ISLAMABAD
    11. 11. IMPULSE ∆t Impulse: ZOHAIB AHMAD MAJU ISLAMABAD
    12. 12. Example 1: The face of a golf club exerts an average force of 4000 N for 0.002 s. What is the impulse imparted to the ball? Impulse: ∆tThe unit for impulse is the newton -second (N-s)Other units are dyne-second and pound-second (lb-s) ZOHAIB AHMAD MAJU ISLAMABAD
    13. 13. Impulse Changes Velocity and MomentumConsider a mallet hitting a ball: Impulse = Change in “m v” Impulse = Change in “m v” ZOHAIB AHMAD MAJU ISLAMABAD
    14. 14. Impulse-MomentumThe impulse – momentum relationship is derived fromNewton’s law of acceleration. Impulse = change in momentum ZOHAIB AHMAD MAJU ISLAMABAD
    15. 15. Impulse and Momentum Impulse = Change in momentum F mv Newton’s Second Law of Motion∆t A force F acting on a ball for a time ∆t increases its momentum mv. ZOHAIB AHMAD MAJU ISLAMABAD
    16. 16. Momentum ImpulseImpulse = Change in momentum Impulse = Change in momentum ZOHAIB AHMAD MAJU ISLAMABAD
    17. 17. PROBLEMS ZOHAIB AHMAD MAJU ISLAMABAD
    18. 18. PROBLEM ZOHAIB AHMAD MAJU ISLAMABAD

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