1
Dane:
Ek=100J
m=2kg
Szukane:
u
2
Dane:
Ep=200J
h=4m
Szukane:
m
3
Dane:
F=100N
W=5000J
Szukane:
s
4
Dane:
Ep=100J
m=4kg
Szukane:
h
5
Dane:
Ek=200j
m=4 m/s [ cztery metry na sekundę kwadrat ]
Szukane:
m
6
Dane:
p=1000W
w=200J
Szukane:
t
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z.1
Ek = [ m* v^2]/2 * 2
2 * Ek = m*v^2
v^2 = ( 2 * Ek)/m
v^2 = (2*100 J )/2 kg = 100 m^2/s^2
czyli v = 10 m/s
=================
z.2
Ep = m*g*h
m = Ep/ ( g *h)
m = 200 J / 10 m/s^2 * 4 m) = 200 J / (40 m^2/s^2 ) = 5 kg
m = 5 kg
===================
z.3
W = F * s
s = W / F = 5000 J / 100 N = 50 m
===============================
z.4
Ep = m*g*h
h = Ep / ( m*g)
h = 100 J / ( 4 kg * 10 m/s^2 ) = 100 J / 40 kg *m/s^2 = 2,5 m
h = 2,5 m
=============
z.5
Ek = [ m *v^2]/2
2 Ek = m*v^2
m = ( 2 Ek ]/ v^2
m = (2 *200 J )/ ( 4 m/s)^2 = 400 J / 16 m^2/s^2 = 25 kg
m = 25 kg
===============
z.6
W = P*t
t = W / P
t = 200 J / 1000 W = 0,2 s
===========================
Danych nie przepisywałem, aby było mniej pisania.