# lecture26 - More Momentum Conservation of Momentum/Energy...

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More Momentum Conservation of Momentum/Energy Elastic and inelastic collisions

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Example 1: The three air carts shown below have masses, reading from left to right, of m , 2m, and 4m respectively. Initially, the cart on right is at rest, whereas the other two carts are moving to the right with speed v o . All carts have putty bumpers that give completely inelastic collisions. The final speed of the carts are:
Example 2 – the ballistic pendulum: A bullet with velocity v b and mass m hits a stationary wooden block of mass M hanging on a string. Given that the block swings through a height h, determine the initial speed of the bullet.

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Example 3 –Tarzan: To save a student from falling into one of the construction holes at McMaster, Tarzan (m=100kg) swings from a 5m long rope that makes an angle of 60 degrees with the horizontal initially. If the student with her physics books has a mass of 50kg, to what new height will they swing together?
Example 4: A block of mass m 1 =1.6kg initially moving right with a speed of

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lecture26 - More Momentum Conservation of Momentum/Energy...

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