At the end of this lesson you should be able to:

• Define linear momentum, impulse, isolated system, elastic versus inelastic collisions, pressure, center of mass of system of masses.
• State NewtonÕs second law in terms of momentum.
• Find the change of momentum of an object due to a given impulse and vice-versa.
• Explain the operating principles of rockets and jet engines.
• Apply conservation laws to various simple collisions.