1.Podniesienie walizki na wysokosci 1m wymaga wymaga wykonania pracy 200J oblicz ciężar i mase walizki?
dane:
h = 1 m
W = 200 J
g = 10 m/s2 = 10 N/kg
szukane:
Fg = ?
m = ?
W = F x s
W = Fg x h I:h
Fg = W/h = 200J/1m
Fg = 200 N
==========
Fg = m x g I:g
m = Fg/g = 200N/10N/kg
m = 20 kg
=========
Odp.Ciężar walizki wynosi 200 N (niutonów),a jej masa 20 kg.
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dane:
h = 1 m
W = 200 J
g = 10 m/s2 = 10 N/kg
szukane:
Fg = ?
m = ?
W = F x s
W = Fg x h I:h
Fg = W/h = 200J/1m
Fg = 200 N
==========
Fg = m x g I:g
m = Fg/g = 200N/10N/kg
m = 20 kg
=========
Odp.Ciężar walizki wynosi 200 N (niutonów),a jej masa 20 kg.