A yellow ball with a mass of 2 kg is rolling across the floor at 3 m/s. A red ball with a mass of 3 kg is rolling across the sam floor at 3 m/s. Which ball has a greater kinetic energy, and why?

Question

Physics

Lauryn Landry

28 July, 01:26

A yellow ball with a mass of 2 kg is rolling across the floor at 3 m/s. A red ball with a mass of 3 kg is rolling across the sam floor at 3 m/s. Which ball has a greater kinetic energy, and why?

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Answers (2)

Know the Answer?

Bird · Answer 1

Red ball because its heavier

Skyler Cardenas · Answer 2

KE=1/2mv^2

So the 3kg ball rolling at velocity of 3m/s has a KE=1/2 (3) (3^2) = 27/2=13.5J

The 2kg ball only has a KE=1/2 (2) (3^2) = 9J

So we can see the 3kg ball has more KE than the 2kg ball because they are moving at the same velocity so the bigger mass has more KE