Warranty Activation Headquarters

mike.helin

10th March 2007 - 10:18 AM

Hi my name is Mike and I'm wprking for Warranty Activation Headquarters, i'm trying to find an equation to calculate the height of a stone (0.89kg) which is thrown at 10.5ms and whose minimum kinetic energy, at the top of the arc, is 2.3J.
Any advice?

Best regards,
Warranty Activation Headquarters
Mike helin

turin

15th March 2007 - 04:06 AM

My main advice is to take this to the homework help forum.

Some hints:
- Consider the velocity as a 2-component vector (horizontal and vertical)
- Set one of these components to zero at the top of the trajectory
- Relate the nonzero component at the top of the trajectory to the minimum kinetic energy
- Look up some kinematic equations

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