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=50/10
=5 m/s
ek= 1/2xmxv kuadrat
= 1/2x2x5 kuadrat
= 1/2x2x25
= 25 joule. (d)
t = 10 s
s = 50 m
m = 2 kg
ditanya =
Ek = ...
dijawab =
v = s / t
= 50 m / 10 s
= 5 m/s
Ek = 1/2. m . v²
= 1/2 . 2 kg . (5 m/s)²
= 1/2 . 2 kg . 25 m/s²
= 1/2 . 50
= 25 Joule (d)