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Deviation of a block

  • Thread starter Gavroy
  • Start date
  • #1
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First of all: Sorry about my English, but I am from France ;-)
The problem:
Somebody shoots into a block which is put up on two free running ropes and now you want to determine the velocity of the projectile by measuring the deviation of the block. I also have to consider gravity, which may protect the block from being deviated and the projectile gets stuck to the block, if this is important.
I want to add that the mass of the projectile, the mass of the block and the length of the ropes are known.
I am sorry that I can’t offer you an initial stage for a solution. The only thing I know is that the conservation of momentum may be a possible approach
 

Answers and Replies

  • #2
tiny-tim
Science Advisor
Homework Helper
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Welcome to PF!

Hi Gavroy! Welcome to PF! :smile:

In questions like this, divide the motion into two stages, the collision and the swing …

i] in the collision, momentum is conserved, so find the final velocity for the collision, wchi becomes the initial velocity for the swing

ii] in the swing, (mechanical) energy is conserved :wink:
 

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