Transcript Aim: How does the force of gravity affect objects?

Aim: How does the force of
gravity affect objects?
Do Now:
Complete worksheet
Gravity
is the force of attraction
between 2 objects
All objects exert
gravitational force.
Newton’s Law of
Universal Gravitation
States that the force of
gravity depends on 2
factors: the mass of the
objects and the distance
between them.
Objects escape
earth’s
gravitational
pull only if …..
A force greater than
gravity is be used to
move objects through
the gravitational pull
of earth and space.
The rate at which an
objects falls is
9.8m/sec/sec
For every second an
object drops, its velocity
is increasing by
9.8m/sec/sec.
What will fall to the
ground first… A
cannon ball with a
mass of 100kg OR
a cannon ball with a
mass of 50kg?
The winner
is…
BOTH will land
at the same
time.
This is because both
objects are
speeding at the
rate at the
All falling objects same
accelerate
same 9.8m/sec/sec
rate
However, air resistance will
effect the objects.
So what about a
falling…
Marble
Rock
Boulder
Which will land first?
The
winner is…
They will all land
at the same
time
…all fall at the
same rate of
gravity. Which
is…
9.8m/sec/sec
A piece of paper
does not fall at 9.8
m/s/s because its
acceleration is
much less
Because…….
Air resistance
SUMMARY
Every object exerts
___________
gravitational force on every
other object. Gravitational
force depends on how
much___________
mass
the objects
have and on how far apart they
Gravity
are. __________
is one of the
forces acting on orbiting objects
and projectiles.