| What is Motion? Section 1-4: Momentum |
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| A. All moving objects have momentum. 1. The more momentum something has the harder it is to stop. 2. An object that is not moving has no momentum. 3. The mass of an object alone will not determine the momentum, or velocity. 4. The greater the momentum, the greater the distance is needed to stop. Formula: MOMENTUM = VELOCITY x MASS B. Conservation of Momentum occurs when one moving object hits a stationary object and it continues to move but the first object stays still. 1. Momentum is conserved when the total momentum of any group of objects remains the same unless an outside influence acts on the object. EXAMPLES: Bat hitting baseball, pool, hurdlers Examples of Momentum Problems: 1. A steel ball has a mass of 100g and is rolling at the rate of 2.8m / sec. What is the momentum? M = V x Mass 2.8m / sec x 100g = 280g-m / sec 2. An object whose mass is 3 kg is fired from a cannon, giving it a forward momentum of 1050 kg-m / sec. What is the velocity? M = V x Mass 1050 kg-m / sec = V= 350 m / sec forward 3 kg V = Momentum Mass |
