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Subjects
Science CBSE
Class 9
Force and laws of motion
Newton’s law of motion, Forces and its types
3.
Law of inertia
Exercise condition:
2
m.
Observe the image carefully and select the right answer
:
1
.
The speed of the marble decreases when it _______ .
moves horizontally
climbs up
remains same
rolls down
2
.
Galileo concluded that objects move with a constant speed when _______ acts on them.
force
no force
couple
moment
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