NEWTON’S LAWS OF MOTION By Ricky Lopez
Dec 14, 2014
NEWTON’S LAWS OF MOTION
By Ricky Lopez
NEWTON’S FIRST LAW OF MOTION
Newton’s first Law of Motion states that an object
at rest stays at rest and an object in motion stays in
motion with the same speed and in the same
direction unless acted on by an unbalanced force.
Also known as the Law of inertia
NEWTON’S 1 S T LAW EXAMPLE
Before During/After
EXPLANATION
This SpongeBob cartoon is a great example of what
happens when a force is applied to an object at rest.
Squid ward is stopped at a red-light and no longer in
motion. SpongeBob comes traveling at a great force
due to the weight of the boat and acceleration. The
force of the collision between the two boats causes
Squid ward to fly out of the boat in motion and will
continue to do so until another force stops him.
NEWTON’S 1 S T LAW EXAMPLE
Before During/After
Pictures provided by Ricky
EXPLANATION
In the example, a ball is left at rest. It isn’t until a
force is applied that the basketball begins to move. If
no other force is applied, the ball will continue to
move because there is no friction.
NEWTON’S 2 N D LAW OF MOTION
Newton’s 2nd law states that the acceleration of an
object is dependent upon two variables – the net
force acting upon the object and the mass of the
object
NEWTON’S 2 N D LAW EXAMPLE
Before During/After
EXPLANATION
In order for a person to cut their lawn, they must
apply force. The engine of the lawn mower already
provides a force. It is called thrust force due to the
mass and acceleration of the blade. However, that
force alone won’t cut the lawn. You still need to
apply the necessary force to the lawn mower in
order to move it. Your end result is a mowed lawn
considering your not to lazy and stop.
NEWTON’S 2 N D LAW EXAMPLE
Before During/After
EXPLANATION
In order for tennis players to win their games, they
need to hit the tennis ball with enough force. If the
force they hit the ball doesn’t go over the net, then
they are penalized. The greater the force means the
greater the acceleration. The tennis players need to
make sure that they can hit the ball at good force to
continue the game.
NEWTON’S 3 R D LAW OF MOTION
Newton’s 3rd Law of Motion states that for every
action, there is an equal and opposite reaction
NEWTON’S 3 R D LAW EXAMPLE
Before During/After
EXPLANATION
A person jumping through the air is an example of
Newton’s 3rd law. In order for a person to jump
through the air, the person needs to exert a force on
the ground or surface. There has to be an opposite
reaction, which means the ground is also going to
exert a force on the person. Without an opposite
reaction, people wouldn’t be able to walk, run, or
jump. The equal and opposite forces is what makes
this possible.
NEWTON’S 3 R D LAW EXAMPLE
Before During/After
EXPLANATION
Swimming is another example of Newton’s 3rd Law.
In order for swimming to happen, the swimmer must
exert a force in the direction he or she wants to go.
They must cycle their arms up and down for them to
go in that direction. As they are exerting that force
and swimming through the water, the water is also
exerting a force in the opposite direction, away from
the swimmers. That is the opposite reaction and
allows the swimmers to proceed in their direction.