please showe work A 2000 kg car moving at 20 mph plows into the back of a 10,000

Question

please showe work

A 2000 kg car moving at 20 mph plows into the back of a 10,000 kg truck that is standing still. The wreckage sticks together after the crash. How fast is it moving? Re-work the above problem, this time with the car standing still and the truck moving at 20 mph. A swimmer dives off the stern of a pontoon boat that is at rest. What will the boat do? What if there are five other adults on the boat?In the above problem, what if the boat is a huge coal barge? Is momentum still conserved in this case?

Explanation / Answer

7) 2000*20 = 12000*v

v = 3.33mph

8) 10000*20 = 12000*v

v = 16.66mph

9) Boat moves forward even if there are ffive other adults

10) YES MOMENTUM IS CONSERVED

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