September 2018 1 37 Report

co znaczą te znaczki *^ i /

m = 1 t = 1000 kg

t = 20 s

S = 400 m

F = ?

S = a t^2 / 2

2 S = a t^2

a = 2 S/ t^2

a = [ 2 * 400 m]/ [ 20 s]^2 = 800 m/ 400 s^2 = 2 m/s^2

F = m*a = 1000 kg * 2 m/s^2 = 2000 kgm/s^2 = 2000 N = 2 kN


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