Force motion
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Transcript of Force motion
![Page 1: Force motion](https://reader034.fdocuments.us/reader034/viewer/2022052507/558cfdfed8b42a4d4b8b45f9/html5/thumbnails/1.jpg)
Physics presentation
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You can tell that an object has moved when its __________ has changed.
position
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frame of
reference
The object used for comparing another object to describe its position is called a…
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The distance an object moves in a certain amount of time is called _________.speed
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A ______ graph can be used to show the change in an object’s speed over time.
line
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Line Graph
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What makes objects change speed ,direction ,shape etc.?
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What unit is used to measure forces?
Yum!!!
Not that kind!
!
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What is a force between surfaces that slows or stops objects?
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heat
Friction creates ______.
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NEWTON’S FIRST LAW OF MOTION
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When an object is in motion it tends to
stay ...
Unless an external force act on it
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When an object is rest it tends to remain at...
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This is called…
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GALILEO'S EXPERIMENTS WITH
ROLLING BALLS DOWN INCLINED
PLANES
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Galileo continued to refine his ideas about objects in motion. He took a
board 12 cubits long and half a cubit wide (about 20 feet by 10 inches) and cut a groove, as straight and smooth
as possible, down the center. He inclined the plane and rolled brass balls down it, timing their descent with a water clock — a large vessel
that emptied through a thin tube into a glass. After each run he would weigh
the water that had flowed out — his measurement of elapsed time — and compare it with the distance the ball
had traveled.
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Aristotle would have predicted that the velocity of a rolling ball was
constant: double its time in transit and you would double the distance it traversed. Galileo was able to show
that the distance is actually proportional to the square of the
time: Double it and the ball would go four times as far. The reason is that it
is being constantly accelerated by gravity.
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The use of a force to move an object is called________.
work
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The ability to do work is
called _________.
energy
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kinetic
The energy in
motion is __________ energy.
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What we have learnt
Force makes an object change shape, speed, direction, etc.
Friction is the force between surfaces
that slows or stops objects.
A line graph can be used to show the change in an
object’s speed over time.
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Friction creates heat.You can tell that an object has moved when its position
has changed.The use of a force to move an object is called work.
The ability to do work is called energy.
The energy in motion is kinetic energy.
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Newton unit is used to measure forces.
Newton’s First Law of Motion – If an object is at
rest it remains at rest and if an object is in motion it remains in
motion unless an external force act on it
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Made by – Gulshan Singh