Download - Force motion
Physics presentation
You can tell that an object has moved when its __________ has changed.
position
frame of
reference
The object used for comparing another object to describe its position is called a…
The distance an object moves in a certain amount of time is called _________.speed
A ______ graph can be used to show the change in an object’s speed over time.
line
Line Graph
What makes objects change speed ,direction ,shape etc.?
What unit is used to measure forces?
Yum!!!
Not that kind!
!
What is a force between surfaces that slows or stops objects?
heat
Friction creates ______.
NEWTON’S FIRST LAW OF MOTION
When an object is in motion it tends to
stay ...
Unless an external force act on it
When an object is rest it tends to remain at...
This is called…
GALILEO'S EXPERIMENTS WITH
ROLLING BALLS DOWN INCLINED
PLANES
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.
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.
The use of a force to move an object is called________.
work
The ability to do work is
called _________.
energy
kinetic
The energy in
motion is __________ energy.
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.
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.
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
Made by – Gulshan Singh