# newtons laws - PowerPoint PPT Presentation

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## newtons laws

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### the dynamics of newtons laws – PowerPoint PPT presentation

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Title: newtons laws

1
The dynamics of Newton's laws
• By Karlee Pruitt!!D

2
Magnetic force
• Magnetic force, like electric forces, are very
large in comparison to gravitational forces.
Magnetic forces are produced by moving electric
changes.

3
Electric forces
• Electric forces can be very large.
• If one extra electron can be added to each of the
atoms in the two tennis balls, the resulting
electric forces between them would be
500,000,000,000,000,000,000 Newton's.

4
Gravitational forces
• Gravitational force is an extremely weak force in
comparison to the other forces. If two tennis
balls are held one meter apart, the gravitational
force between them is only 0.000 000 000 01
newton.

5
Weak interaction and nuclear force
• Nuclear forces are much stronger than any other
force. The nuclear force holds the nucleus of an
atom together in spite of the strong electric
force of repulsion between its protons. When this
happens, a huge amount of nuclear energy is
released.

6
Newton's first law and how its in peoples life
• a body continues in its state of rest, or of
uniform motion in a straight line, unless it so
acted upon by a net external force. For example
in today's life, a car that is sitting still (no
motion) is acted upon by another force of another
car can mace it move if it comes in contact with
the first car.

7
Newtons second law and how its in peoples life.
• the rate of change of momentum is proportional
to the imposed force and goes in the direction of
the force. Aexample is a train wreck. If a train
hits another train of equal force and speed, they
will both go the same distance and feel the same
force. But if the first train is hooked to a
second, the single train will go twice the
distance of the double train and will feel twice
the force.

8
Newtons 3rd law and examples of it every day life
• For every action there is an equal and opposite
reaction. When sitting on a chair, your body
exerts a force on the chair and the chair exerts
an equal force back if the chair didn't exert the
same force you would fall on your butt

9
FMA (ex)
• F ma lets us work out the forces at work on
objects by multiplying the mass of the object by
the acceleration of the object.
• Example The force at work on a Formula 1 car as
it starts a race! If the F1 car has a Mass of
600kg and an Acceleration of 20m/s/s then we can
work out the Force pushing the car by
multiplyingthe Mass by the Acceleration like
this 600 x 20 12000N.

10
MFA (ex)
• Weight (force) FMass ma acceleration (due to
gravity)F mam/F 1/aMass divided by
weight reciprocal of acceleration due to
gravity.
• For example people on earth.

11
AF/A (ex)
• m is the mass, f is the force and a is the
acceleration (deceleration if negative).The
equation is a re-arranged form of the equationF
ma (force mass times acceleration) Working
out how much force is used to push a F1 car when
broken down or run out of fuel
• If the car has a mass of 700kgAnd a driver
pushes the car with an acceleration of
0.05m/s/sThenF MAForce 700kg x
0.05m/s/sForce 35kN (kiloNewtons)?

12
• where m is the mass of the object see reference
1 for a discussion of how to define mass.
Meanwhile, g is the vector representing the local
gravitational acceleration. This is also called
the gravitational field (in analogy to electrical
field, magnetic field, et cetera). We define g
as
• g the acceleration of a freely-falling test
particle.

13
MW/g
• To fine mass you have to take weight and divide
it by gravity.

14
Gw/m
• To fine gravity you half to divied we.ight to
find the mass