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Madhya Pradesh Police Exam Model Paper 5
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© examsnet.com
Question : 78
Total: 100
When a ball is thrown upward, its total energy:
Increases
Decreases
Remains same
None of the above
Validate
Solution:
The correct answer is
Remains same
.
When a ball is thrown upward, its total energy
remains the same
.
When an object is thrown vertically upwards, its
potential energy keeps on increasing
and kinetic energy keeps on decreasing.
The total energy of the ball remains the same.
At maximum height, the velocity is zero (no kinetic energy) and the ball will have only potential energy.
The energy possessed by a body by virtue of its position is called
potential energy
.
The energy possessed by a body due to its motion is called
kinetic energy
.
Kinetic energy is always
positive
.
Energy may be transformed from one form to another but the total energy of an isolated system remains constant.
When an object is thrown vertically upwards then
energy conversion takes place
, energy can neither be created nor destroyed.
© examsnet.com
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