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Which of the following has the greatest kinetic energy?
O
a 20 kg stone traveling at 10 m/s
O
a 40 kg ball traveling at 4 m/s
O
a 30 kg lead pipe traveling at 6 m/s
O
a 50 kg pillow traveling at 2 m/s

Respuesta :

imsupergay546

Answer: A 20kg Stone traveling an 10 m/s

Explanation:

The Formula for Kinetic Energy is KE = 0.5 x mv², using this equation you can then find the item with the most Kinetic Energy in Joules (J) 0.5 x 20 x 10 = 200 Joules.

Giangiglia

Answer:

The 20 kg stone traveling at 10m/s

Explanation:

Hi, the kinetic energy is the energy available of the objects in movement.

That energy can be calculated be the next formula:

[tex]ec=0.5*m*v^2[/tex]

Where:

  • ec is the kinetic energy [J]
  • m is the mass of the object [kg]
  • v is the velocity of the object [m/s]

Case A:

[tex]ec=0.5*20kg*(10m/s)^2[/tex]

[tex]ec=1000 J[/tex]

Case B:

[tex]ec=0.5*40kg*(4m/s)^2[/tex]

[tex]ec=320 J[/tex]

Case C:

[tex]ec=0.5*30kg*(6m/s)^2[/tex]

[tex]ec=540 J[/tex]

Case D:

[tex]ec=0.5*50kg*(2m/s)^2[/tex]

[tex]ec=100 J[/tex]

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