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Sagot :
A. The kinetic energy of the stone is 4500 J
B. The kinetic energy of the baseball is 180 J
C. The kinetic energy of the bullet is 900 J
A. Determination of the kinetic energy of the stone
- Mass (m) = 10 Kg
- Velocity (v) = 30 m/s
- Kinetic energy (KE) =?
KE = ½mv²
KE = ½ × 10 × 30²
KE = 5 × 900
KE = 4500 J
B. Determination of the kinetic energy of the baseball
- Mass (m) = 100 g = 100 / 1000 = 0.1 Kg
- Velocity (v) = 60 m/s
- Kinetic energy (KE) =?
KE = ½mv²
KE = ½ × 0.1 × 60²
KE = 0.05 × 3600
KE = 180 J
C. Determination of the kinetic energy of the bullet
- Mass (m) = 20 g = 20 / 1000 = 0.02 Kg
- Velocity (v) = 300 m/s
- Kinetic energy (KE) =?
KE = ½mv²
KE = ½ × 0.02 × 300²
KE = 0.01 × 90000
KE = 900 J
SUMMARY
- Kinetic energy of stone = 4500 J
- Kinetic energy of baseball = 180 J
- Kinetic energy of bullet = 900 J
From the above, we see clearly that the stone has the highest kinetic energy followed by the bullet and then the baseball.
Learn more about kinetic energy:
https://brainly.com/question/19756336
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