Mechanics
Station 1
Summary: Two balls are thrown at the same time, one is let
go without x-axis velocity but the second ball is thrown straight. Which ball
will fall first?
Answer: Both will fall at the same time due to the constant acceleration
due to gravity (9.8m/s2).
Station 2
Summary: Newtonian balls (study of momentum)
Station 3
Summary: A car has a propeller, which way will it move?
Answer: The opposite way where the air is blown. This is
because of Newton’s third law of motion, for every action there is an equal and
opposite reaction. As the propeller applies force on the air, the air applies
the same force on the car which makes the car move the opposite way.
Station 4
Summary: Pendulum.
Question: What determines the amount of times it takes to
make a complete swing?
Answer: gravity,
length of the rope
Wrong answers: force of pushing, mass of object
Summary: One of the pendulums starts swinging, will any of
the others move as a result?
Answer: Yes. Due to similar natural frequencies, another
pendulum with the same length will start moving as well. This is why opera
singers can break glasses, because they manage to sing a pitch whose sounds
waves match those of the glass.
Station 5
Summary: Balls roll in two different sloped structures.
Which ball will fall faster?
Hypothesis: Same time because of their potential to reach
the same max velocity.
Answer: The one with the steeper slope. The reason for this
is that even though they both reach the same max velocity, that with the steeper
slope reaches that velocity earlier.
Static Electricity
Station 6
Summary: A ruler is rubbed against another material to gain
static electricity. After charged and when put next to water, the water moves
toward the ruler.
Magnetism
Station 7
Summary: 2 big
magnets are trying to touch each other where North touches North and South
touches South.
Answer: Impossible. Opposite poles attract and similar poles
repel.
Station 8
Summary: How do we make electricity?
Answer: All you need is a copper wire (or any other metal
that is a good conductor of electricity) and a magnet. The three things that
determine the amount of electricity produced is: speed of movement of magnet,
size of magnet, amount of coil.
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