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Answer:
kinetic energy is equal to potential energy
so k.E = mgh
K.E = mgh
= 9.8×10×8
= 98×8
= 784
Explanation:
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Verified answer
Question: A body of mass 10 kg falls freely from a height 8 m. What will be its kinetic energy on reaching ground. g = 9.8 m/s²
Provided that:
To calculate:
Solution:
Using concept:
Using formula:
Where, E_p denotes potential energy, m denotes mass of body, g denotes acceleration due to gravity and h denotes height.
Explanation: As the body is falling freely from a height means it is moving with a kinetic energy and it is going to fall on ground, therefore, here we can use formula to find out potential energy to solve this question as here according to the condition, Kinetic energy = Potential energy.
Required solution:
[tex]{\sf{:\implies Potential \: energy \: = mgh}}[/tex]
[tex]{\sf{:\implies E_p \: = mgh}}[/tex]
[tex]{\sf{:\implies E_p \: = 10(9.8)(8)}}[/tex]
[tex]{\sf{:\implies E_p \: = 98(8)}}[/tex]
[tex]{\sf{:\implies E_p \: = 784 J}}[/tex]
[tex]{\sf{:\implies Potential \: energy \: = 784 J}}[/tex]
[tex]{\sf{\therefore \: Kinetic \: energy \: = 784 J}}[/tex]