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Science CBSE Homework Assignments
Class 9
Work and Energy
Basics of work done and problems
2.
Exercise on basics of work and energy
Task:
2
m.
Choose the appropriate answer
:
1
.
SI unit of power is __________.
watt
joule
newton
metre
2
.
When a body falls freely towards the earth, then its total energy __________.
remains the same
first decreases and then increases
increases
decreases
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