Question

How fast would a 2-kilogram object need to move to have the same kinetic

energy as a 4-kilogram object moving at 8 meters per second?

Answer 1

11.3 m/s

Step-by-step explanation:

KE₁ = KE₂

½m₁v₁² = ½m₂v₂²

½ (2 kg) v² = ½ (4 kg) (8 m/s)²

v ≈ 11.3 m/s