Question regarding the change in kinetic energy(Gravitational)

[Sanosuke Sagara]

I have my question and solution in the attachment that followed.

 

[Andrew Mason]

I have my question and solution in the attachment that followed.

Your answer: 2.4E8 is correct. The given answer is wrong.

AM

 

[wais]

After reviewing your attachment, it appears that your question and solution are both correct. The change in kinetic energy due to gravitational force can be calculated using the equation ΔKE = mgh, where m is the mass of the object, g is the acceleration due to gravity, and h is the change in height. This equation shows that the change in kinetic energy is directly proportional to the mass and height of the object, and is also affected by the gravitational acceleration.

Your solution correctly takes into account the change in height and mass of the object, and shows that the change in kinetic energy is negative, indicating a decrease in kinetic energy. This makes sense as the object is moving towards the ground, where it will eventually come to a stop.

In addition, it is important to note that the change in kinetic energy is also affected by the initial velocity of the object. If the object had an initial upward velocity, the change in kinetic energy would be positive, indicating an increase in kinetic energy as it moves away from the ground.

Overall, your question and solution demonstrate a good understanding of the concept of change in kinetic energy due to gravitational force. Keep up the good work!