Rock Street, San Francisco

Jack Shumski

Professor Verdecia

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Fire Technology 102

20 November 2017

Physical Principle Of A Catapult To
The Fire Service

A catapult does many different things that relate to different
physical principles. The big physical principle of the catapult is it uses
Newton’s first, second and third law. In fact, also all three of Newton’s law
can relate a lot to the fire service and how it operates. This essay will
relate the physical principle of the catapult, to Newton’s laws and how it
relates to the fire service. It addresses three main ideas: what Newton’s laws are,
how it relates to the catapult and how does newton’s laws relate to the fire
service. This will pinpoint main ideas of the fire service and how Newton’s
laws are used every day in the service. Knowing how catapults and the laws
work, could greatly help the fire service in everything it does on the fire
ground.

Newton’s First Law states that an object will remain at rest or
in uniform motion in a straight line unless acted upon by an external force.

That objects will remain in their state of motion unless a force acts to change
the motion. Newton’s First Law relates to the catapult. The arm of the catapult
is pulled back and let go, this causes a change in motion, which makes the
projectile object move. Specifically, tension and elastic force put the object
into motion when the arm is released, by causing an unbalanced force.

Newton’s second law states that the acceleration of an object as
produced by a force is proportional to the magnitude of the force, in the same
direction as the force, and proportional to the mass of the object. Catapults
are one good way to learn about the relationship between force, mass, and
acceleration. The mass and weight of the payload will affect the power distance
of the launch also the less mass the payload has the more resistance it will
get from air resistance.

Newton’s third law states that for every action, there is an
equal and opposite reaction. This statement means that in every interaction,
there is a pair of forces acting on the two interacting objects. The size of
the forces on the first object equals the size of the force on the second
object. Newton’s Third law of motion states that for every action force, there
is a reaction force that is equal in strength and opposite in direction. The
catapult arm is pushing up on the elastic bands with a lot of force, but my
hand is pushing back, in the opposite direction, making the catapult arm move
downwards. Only when I remove my hand and the elastic takes that force and
moves the arm up, will you have the greater force.

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