дано L=10 м t=4 с h- ?
L=S=at^2\2
a=mg*sina\g=g*sina=g*h\L
L=ght^2\L
h=L^2\gt^2=100\10*4*4=0.625 м=62,5 cм
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дано L=10 м t=4 с h- ?
L=S=at^2\2
a=mg*sina\g=g*sina=g*h\L
L=ght^2\L
h=L^2\gt^2=100\10*4*4=0.625 м=62,5 cм
Verified answer
V=10 м/4с=2.8м/сЕк=mv^2/2 Еп=mgh
mgh=mv^2/2
2mgh=mv^2
2gh=v^2
h=v^2/2g=0.3125м=31.25см
Ответ: h=31.25см