Respuesta :

Answer: 2 kg.

Explanation: Kinetic Energy is expressed as the product of mass and squared of velocity over two KE=1/2 mv² . Derive the following expression for mass. m=2KE/v² then substitute the values 2(225J)/ (15 m/s)² =2kg

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Answer:

Explanation:

Kinetic energy = 1/2 ×m × v^2

Kinetic energy = 225J

Velocity v = 15m/s

225 = 1/2 × m × 15^2

225×2 = 225 × m

450 = 225m

m = 450/225

m = 2kg

Mass is 2kg