Respuesta :
Answer:
Kinetic energy, E = 40 Joules
Explanation:
Given that,
Mass of the object, m = 2 kg
It is released from rest from a height of 3 m above Earth's surface, [tex]h_1=3\ m[/tex]
We need to find the kinetic energy the object have when it reaches a height of 1 m, [tex]h_2=1\ m[/tex]
It is a case of conservation of mechanical energy. It states that the total energy of the system remains constant. The kinetic energy is given by :
[tex]E=mg(h_1-h_2)[/tex]
[tex]E=2\times 10\times (3-1)[/tex]
E = 40 Joules
So, the kinetic energy of the object when it reaches a height of 1 m is 40 joules. Hence, this is the required solution.
