<span>∆ р=р2-р1 р1=mV1=0, т.к. V1=0
</span><span>∆ p=p2=mV2</span> =10000*15=150000[кг*м/с]=1.5*10^5[кг*м/с]
Р= 5*10*2700= 135000Па=135кПа
L=(T/2п)^2 /С=Т^2 /(4С*п*п)
F2= S2 F2=F1*S2
______ ________
F1 S1 S1
<span>F2=</span><span>18000H *4см2</span><span> </span>
<span> ________________ = 400Н</span>
<span> <span>180см2</span></span>
<span><span>
</span></span>
как то так =)
X=Xo+Vot+(a/2)t2
х(t)=5-4t-2t2
Vo=-4м/с
а=-4м/с2