Science, asked by manya8344, 7 months ago

frictional force may be minimised by using a
Smooth marble and a smooth plane and
providing a lubricant on top of the planes,
acquired Hll then.
not weather po cellarly
9.2 First Law of Motion
By observing the motion of objects on an
Inclined plane Galileo deduced that objects
move with a constant speed when no force
acts on them. He observed that when a marble
rolls down an inclined plane, its velocity
increases (Fig. 9.5(a)]. In the next chapter,
you will learn that the marble falls under the
unbalanced force of gravity as it rolls down
and attains a definite velocity by the time it
reaches the bottom. Its velocity decreases
when it climbs up as shown in Fig. 9.5(b).
Fig. 9.5(c) shows a marble resting on an ideal
frictionless plane inclined on both sides.
Galileo argued that when the marble is
Fig.
released from left, it would roll down the slope
and go up on the opposite side to the same
height from which it was released. If the
inclinations of the planes on both sides are
equal then the marble will climb the same
distance that it covered while rolling down. Il
the angle of inclination of the right-side plane
were gradually decreased, then the marble
would travel further distances till it reaches
the original height. If the right-side plane were
ultimately made horizontal (that is, the slope
is reduced to zero), the marble would continue
to travel forever trying to reach the same
height that it was released from. The
force
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unbalanced forces on the marble in this case
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are zero. It thus suggests that an unbalanced
velocit
(external) force is required to change the
law of
motion of the marble but no net force is
inertia
needed to sustain the uniform motion of the
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marble. In practical situations it is difficult while
to achieve a zero unbalanced force. This is
because of the presence of the frictional force
explain
acting opposite to the direction of motion.
Thus, in practice the marble stops after
travelling some distance. The effect of the
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Answers

Answered by aniketparoji570
1

Answer:

Take that lubricant and use it for faster friction

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