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2
NOTE: this program would notlet us highlight, underline or
bold so stars were put around
the required statements like it is
done on this one
3
Three surfers named Nick, Jason and Riley are best friends. They have been surfing together their whole lives and ever since they were
young, they have been practicing for the National Surfing
Championships.
4
Not only are the competing against each other for the the surfing championship, they are also competing to win the heart of the
cutest surfer girl, Kylie. They believe that whoever wins
the competition will also win her heart.
5
Duke is a nerdy kid who is also crushing on Kylie, but he knows that she is out of his league. He decides that in order to
get closer to her, he will offer his knowledge of physics to help
Nick, Jason, and Riley become better surfers.
6
Duke goes to go to the beach to observe Nick, Jason and Riley surf. While he is there, he writes down notes that he
thinks will help them improve.
7
After Nick, Jason and Riley are done surfing, Duke approaches them and explains how he can help their
surfing. The boys immediately realize how beneficial
Duke's physics help could be to them.
8
Duke begins this lesson by asking what they wantto improve on the most.
"I want to work on my speed!" said Jason.
"Same!" echoed Riley and Nick.
"According to Newton's Second Law of Motion,
f=ma, to have a greater acceleration you need a
bigger force" said Duke.
9
"What does F=ma stand for?" asked Riley. "F=ma stands for force equals mass times acceleration" responded Duke.
(8)
"Well if we need more force to get a faster acceleration, then what exactly
is force and how do we get it?" wondered Nick.
Duke ponders this and says, "Force is the strength or power exerted up
on an object. In order for you to gain force, you will need to increase
your arm strength so you can propel your board forward into the wave
faster" (1)
10
"You're wrong," corrects Duke. (4) "Mass is the amount of matter in an object while weight is the pull of gravity on the
matter of an object. In this case, both a larger and smaller mass
are helpful. If you want greater stability, then you should use a
larger board, but if you want more maneuverability, then you should
pick the shorter board."
"So where does mass come into the formula?"
"Duh Riley, mass is like weight"
11
"If mass doesn't have much to do with surfing, then doesweight have a part in it?" asked Jason.
"Well weight is not something that will help you win, but
it is affected by gravity. Weight and gravity have a
direct relationship, when gravity is increased, weight is
increased."(5)
12
"Well every time I try to go faster, my feet slip off the board.How do you think I should fix that?" asked Nick.
"You probably need some sort of friction on the surface of
your board. (3)Friction is the surface resistance to relative
motion" answered Duke. "Basically you need to go to the surf
shop and buy the grippy surface that they produce for this
particular situation. Also, while you are there, go ahead and get
your board waxed because it will reduce the friction between
the water and your board."
13
"Alright well then let's head over to thesurf shop" said Nick.
14
At the surf shop, Duke overhears the boys say, "We should ditch this nerd, we already got
what we want out of him" so Duke leaves the
shop deciding he will win Kylie's heart by
entering the surfing contest on his own. He
seeks out Kylie's help to learn how to surf.
15
gravitybuoyancy of water
board at equilibrium16
"You're going to have to learn how to balance on the board" Kylie informs Duke.
"Oh you mean like equilibrium?" asks Duke.
"Umm what is that?" a confused Kylie asks.
"Equilibrium occurs when the net force equals zero"
states Duke. (7)
17
"What is net force?" wondered Kylie."Net force is the total amount of forces acting
on an object" answered Duke. (6)
"Yeah then I guess you will have to find your
equilibrium so you can stay up on the board"
said Kylie.
18
"Yes, I need to balance the force of gravity and the normal force which is the buoyancy of the water
pushing up on my board. (9) This is also an action-reaction
pair because as I push down, the water pushes up since
every action has an equal and opposite reaction." (10)
states Duke.
action-reaction pairs19
"The goal of surfing is to accelerate to a fast speed and then maintain that speed along the wave as long
as possible" says Kylie.
20
10 mph20 mph40 mph30 mph21
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"The Surf Nerd"
Three surfers, Nick, Jason, and Riley, compete in a surfing championship while vying for the attention of Kylie. Duke, a nerdy kid, helps them improve their surfing skills using physics. Duke later competes in the championship and wins, impressing Kylie a
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