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= 1/2 × 1500 × 72^2
= 750 × 5184
= 3.888.000 j
v = 72 km/jam (dirubah ke m/s sesuai satuan internasional)
=>
=
= 20 m/s
Dit: Ek...?
Ek = mv²
= x 1.500 x 20²
= x 1.500 x 400
= 1.500 x 200
= 300.000 J (JAWAB: B)