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- Homework Statement
- An astronaut on the moon has a string with a marble attached to the end.

he pulls the string [straight out] to the side and releases it [the marble]. the marble falls down and continues upwards on the other side until it reaches the same hight as it was when the astronaut released it .

assume that the string has a mass so small that we look away from it.

the marble weighs 10g and the field strength of the moon is gm = 1.6N / kg ,

the distance from the marbels highest point to its lowest is 1M.

what is the speed of the marble when it is at its lowest point ?

- Relevant Equations
- N/A

Sorry for the bad english.

This might sound stupid but I am pretty new the physics and i can't seem to find what formula to use on this problem when only the mass, gravity and height of the fall is given.

and i can't find a similar problem in the book, could someone give me any pointers?

Thanks

This might sound stupid but I am pretty new the physics and i can't seem to find what formula to use on this problem when only the mass, gravity and height of the fall is given.

and i can't find a similar problem in the book, could someone give me any pointers?

Thanks

**[Additions in brackets by a Mentor to clarify the problem a bit]**
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