A ball of mass 2kg is at a height of 8m. calculate its total energy at that height. If we drop it from their hight. what will be the PE and KE of it why it is at a height of 20m above the ground.
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Answered by
1
energy = Potential Energy + Kinetic Energy =800 J
At certain height when Potential Energy = Kinetic Energy =400 J
Kinetic Energy =
2
1
mv
2
=400
⇒v=20
20ms-1
Answered by
0
Explanation:
20 ms
−1
Total energy = Potential Energy + Kinetic Energy =800 J
At certain height when Potential Energy = Kinetic Energy =400 J
Kinetic Energy =
2
1
mv
2
=400
⇒v=20 m/s
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