Transformari in SI
m1=m2=100g=0.1kg
d2=116 cm=1,16 m
-----------------------------
v1=d1/t1=0.62/1.13=0,55 m/s (aproximat)
v2=d2/t2=1,16/2.35=0.49 m/s
L=F*d=m*a*d
a1=v1/t1=0.55/1.13=0.48 m/s²
a2=v2/t2=0.49/2.35=0.20 m/s²
L1=m1*a1*d1 = 0.1*0.48*0.62 = 0.029 J
L2=m2*a2*d2 = 0.1*0.20*1.16 = 0.023 J
P=L/t
P1=L1/t1=0.029/1.13 = 0.025 W
P2=L2/t2=0.023/2.35 = 0.009 W
Ec=m1*(v1)²/2 +m2*(v2)²/2 = 0.1*0.30/2 + 0.1*0.24/2 = 0.027 J
Ep=0
E=Ec+Ep=0.027 J
La prima problema
m1=m2=100g=0.1kg
h1=9,4cm=0,094 m
h2=3,4cm=0.034m
v1=h1/t=0,094/1.35=0.069 m/s
v2=h2/t=0.034/1.35=0.025 m/s
Ec=m*v²/2
Ec=Ec1+Ec2=m1*(v1)²/2 + m2*(v2)²/2
Ec=0.1*0.004/2 + 0.1*0.0006/2 = 0.0023 J
Ep1=m1*g*h1=0.1*10*0,094=0.094 J
Ep2=m2*g*h2=0.1*10*0,034=0.034 J
Ep=Ep1+Ep2=0.094+0.034=0.128 J
