Lucru mecanic si energia

h (m)	Viteza (m/s)	Ug (J)	Ec (J)	Emec (J)
2.000	0.0 m/s	Raspuns Ug = m*g*h g=9.8 m/s/s m=0.200 kg h=2.000 m deci Ug=3.920 J	Raspuns Ec=.5*m*v^2 m=0.2 si v=0.0 deci Ec = 0 J	Raspuns Emec=Ug+Ec Ug=3.920 J Ec=0 J asa Emec=3.920 J
1.490	Raspuns Afli Ug, apoi Ec, apoi viteza. Pt ca Ec=.5*m*v^2, v=radical(2*Ec/m). Cu Ec=1.00 J m=0.200 kg Afli v = 3.162 m/s.	Raspuns Ug = m*g*h g=9.8 m/s/s m=0.200 kg h=1.490 m asa Ug=2.920 J	Raspuns Emec=Ug+Ec deci Ec = Emec - Ug Emec = 3.920 J Ug=2.920 J deci Ec = 1.000 J	3.920 J
1.128	Raspuns Afli Ug, Ec, apoi viteza. Ec=.5*m*v^2, deci v=radical(2*Ec/m). Ec=1.709 J si m=0.200 kg deci v = 4.134 m/s.	Raspuns Ug = m*g*h g=9.8 m/s/s m=0.200 kg h=1.128 m deci Ug=2.211 J	Raspuns Emec=Ug+Ec deci Ec = Emec - Ug Emec = 3.920 J Ug=2.211 J deci Ec=1.709 J	Raspuns Emec se conserva. Va fi la fel ca cea initiala: 3.920 J.
0.897	Raspuns Afli Ug, Ec, apoi viteza. Ec=.5*m*v^2, deci v=radical(2*Ec/m). Ec=2.172 J si m=0.200 kg, deci v = 4.660 m/s.	Raspuns Ug = m*g*h g=9.8 m/s/s m=0.200 kg h=0.897 m deci Ug=1.748 J	Raspuns Emec=Ug+Ec deci Ec = Emec - Ug Emec = 3.920 J Ug=1.748 J deci Ec=2.172 J	Raspuns Emec se conserva. Va fi la fel ca cea initiala: 3.920 J.
0.357	Raspuns Afli Ug, Ec, apoi viteza. Ec=.5*m*v^2, deci v=radical(2*Ec/m). Ec=3.220 J si m=0.200 kg, deci v = 5.675 m/s.	Raspuns Ug = m*g*h g=9.8 m/s/s m=0.200 kg h=0.357 m deci Ug=0.700 J	Raspuns Emec=Ug+Ec deci Ec = Emec - Ug Emec = 3.920 J Ug=0.700 J deci Ec=3.220 J	Raspuns Emec se conserva. Va fi la fel ca cea initiala: 3.920 J.