Momentum problem

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A 3kg puck revolves in a circle on a frictionless table at the end of a 50cm long string. The puck's angular momentum is 3kg (m^2/s). What is the tension in the string?

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Knowing the angular momentum what can you find? How does this relate to force or tension?
 
  • #3
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Parth Dave said:
Knowing the angular momentum what can you find? How does this relate to force or tension?
L= mrv
therefore
3kg*.25m*v = 3kgm^2/2
v=4m/s
F=(mv^2)/r
(3kg*16m/s)/(.25m) = 192N

is this right?
 
Last edited:

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