I need help to physics problem...i dont know how to do question 1!!?

M

Mariah

New member
http://docs.google.com/viewer?a=v&pid=sites&srcid=ZGVmYXVsdGRvbWFpbnxjc3NtcGh5c2ljc3xneDoxNDc2ODcyYjYyMTM3MzUw

Can someone tell me how to do question one? Im really confused. thanks...
 
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