Gracebrown1530 Gracebrown1530
  • 13-09-2019
  • Physics
contestada

If an object moves twice as fast how do you think its energy changes? halves
doesn't change
doubles
quadruples

Respuesta :

valeriagonzalez0213
valeriagonzalez0213 valeriagonzalez0213
  • 17-09-2019

Answer:

If an object moves twice as fast its kinetic energy quadruples.

Explanation:

The kinetic energy (K₁) of a body of mass (m) that moves with speed (v) is:

K₁= 1/2 * m* v²

If we double the speed of the body, its kinetic energy (K₂) will be:

K₂= 1/2 * m*( 2v)²

K₂= 1/2 * m* 4 *v²

K₂= 4(1/2 * m *v²)

K₂= 4*K₁

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