Diketahui : m = 20000
v1 = 80 km/jam
v2 = 100 km/jam
t = 10 sekon
ditanyakan :
a. usaha?
b. daya?
v1 = 80 km/jam
v2 = 100 km/jam
t = 10 sekon
ditanyakan :
a. usaha?
b. daya?
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=
=
= 10.000 . 20 km/jam
= 10.000 kg . 5,6 m²/s²
= 56000 Joule
P =
=
= 5600 watt