GunnerVIII Posted June 15, 2003 Share Posted June 15, 2003 Ok i have 2 questions - the first one is this: A bullet of mass 0.01kg travelling at velocity v hits a block of wood suspended on a long string. The mass of the block is 1.00kg (a) find the bullets velocity v (i've already done this using) (b) to what height does the block rise after collision? Im thinking that this is a projectile motion question Here is the second question: When u hammer a nail into a wall the nail exerts a force on the wall, and the wall exerts a force on the nail. How then does the nail penetrate the wall Any help would be great!!! Link to comment Share on other sites More sharing options...
Giles Posted June 15, 2003 Share Posted June 15, 2003 Can you just work out the KE, and then ask how high the block would rise if it was all converted to GPE? Link to comment Share on other sites More sharing options...
JaKiri Posted June 16, 2003 Share Posted June 16, 2003 Originally posted by Giles Can you just work out the KE, and then ask how high the block would rise if it was all converted to GPE? Yes. Link to comment Share on other sites More sharing options...
GunnerVIII Posted June 17, 2003 Author Share Posted June 17, 2003 Yeah i tried something like that using mgh=1/2mv^2 - 1/2 mu^2 and it worked Link to comment Share on other sites More sharing options...
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