100g piłkę wyrzucono do góry z prędkością 5m/s. Na jaką maksymalną wysokość wzniesie się piłka?
dane:m = 0,1 kgv = 5 m/sg = 10 m/s2mgh = mv²:2 /:mgh = v²:2 /x22gh = v² /:2gh = v² : 2gh = 25 : 20h = 1,25 m
Licze na naj ;]
m = 100 g = 0,1 kg
v = 5 m/s
Ek = Ep
[ m *v^2]/2 = m *g*h / * 2
m*v^2 = 2 m*g*h / m
v^2 = 2 *g*h => h = v^2 /( 2 g)
czyli
h = ( 5 m/s)^2 : 20 m/s^2 = 25 m^2 /s^2 : 20 m/s^2 = 1,25 m
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dane:
m = 0,1 kg
v = 5 m/s
g = 10 m/s2
mgh = mv²:2 /:m
gh = v²:2 /x2
2gh = v² /:2g
h = v² : 2g
h = 25 : 20
h = 1,25 m
Licze na naj ;]
m = 100 g = 0,1 kg
v = 5 m/s
Ek = Ep
[ m *v^2]/2 = m *g*h / * 2
m*v^2 = 2 m*g*h / m
v^2 = 2 *g*h => h = v^2 /( 2 g)
czyli
h = ( 5 m/s)^2 : 20 m/s^2 = 25 m^2 /s^2 : 20 m/s^2 = 1,25 m
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