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m₁= m₁
v₁= v₁
m₂= 3m₁
v₂= 2v₁
ditanya
Ek₂ : Ek₁=...?
jawab
Ek= 1/2.mv²
Ek₂ : Ek₁
1/2.3m₁(2v₁)² : 1/2.m₁(v₁)² <<< coret 1/2 nya
3m₁.4v₁² : m₁.v₁²
3.4 : 1.1
12 : 1
jadi,perbandingan Ek kedua dan pertama adalah 12:1
m2 = 3m, v2 = 2v
Ek2 : Ek1 = __?
Ek2 / Ek1
= (½ m2 v2²) / (½ m1 v1²)
= m2 / m1 × (v2 / v1)²
= 3m / m × {2v / V)²
= 3 × 4
= 12
Ek2 : Ek1 = 12 : 1 ← jwb