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work power and energy!

 
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kjskjs



Joined: 12 Apr 2011
Posts: 2
Location: canada
PostPosted: Wed Apr 13, 2011 12:02 am    Post subject: work power and energy! Reply with quote
you use 94 J of energy to lift a box of Halloween decorations 1.5 m What is the mass of the box of decoration?
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hepcj
Site Admin


Joined: 23 Jun 2007
Posts: 121
PostPosted: Wed Apr 13, 2011 1:04 am    Post subject: Reply with quote
Potential energy = m g h
Solve for m
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kjskjs



Joined: 12 Apr 2011
Posts: 2
Location: canada
PostPosted: Thu Apr 14, 2011 12:00 am    Post subject: Reply with quote
thankyou Smile
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