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I believe I have the first part worked out:U=mgh --> U=980 K+U=0 --> K= -980-980=.5(20)(v^2) --> v=9.9 m/sBut I have no idea where to go on the second part.
Two vectors u and v are given.
(a) Find the component of u along v?
(b) Find projection of u onto v?
u= i+2j.
v=4i-9j
TwopuTwo pure samples ofatoms, labeled A and B, contain oxygen atomsand carbon atoms,respectively. Each sample contains the same numberofatoms. What is the ratio of the mass of sample B to that ofsampleA, mB/mA? Notethe followingatomic masses: C = 12 u; O = 16 u.
(a)1.0 b).5 (c)2.0 d)1.5 (e)0.75