Investigating a Ski Jump
Background Knowledge: I will use formulas in the prediction to predict
what will happen. The main formulas I will use will be
Loss of potential energy = mgh m=mass g=gravity h=height
Ek =1/2mv² Ek= kinetic energy v=velocity
In the experiment the ball bearing will begin with potential energy.
In order to predict the distance the ball travels I need to find out
the horizontal speed of the ball upon leaving the rail. I will do this
by making Ek equal to mgh to make a new formula, then making it equal
to velocity.
mgh = 1/2mv² gh = 1/2v² v² = ¶2gh
v=¶19.6h h= height started v=velocity g=9.8
This formula will be used to find the horizontal speed of the ball
which in the air will not change as I am ignoring air resistance.
After finding the horizontal speed I will need to find the amount of
time the ball is in air which is the same every time.
S =ut + 1/2at² s = distance u= intial velocity a= accelaration t= time
Aim: To investigate how changing the height a ball is dropped on a
ramp changes the distance it travels.
Prediction: During my prediction I will use these formulas which I
worked out in my background knowledge.
v= ¶19.6h v=velocity h=height
t=¶2s s= distance a= acceleration t= time
a
Vt =distance
In the prediction I can ignore the amount of time it takes to hit the
floor as it will not change.
In the final formulae only velocity will change so it has a direct
correlation. As height is the only variable in the formula velocity
also has a direct correlation.
Therefore I predict that as height of the ball increases distance the
ball travels will increase to.
In the results I will make a graph with height the ball is dropped
from on the axis and the formula ¶19.6h on the x axis and ¶2s
a
on the y. If my prediction is right I should be able to draw a
this solution we had to weigh out 5g of KHP, which is the amount needed to
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The mass of Mg + the mass of O2=mass of MgxOx. Knowing the mass of
PREDICTION: I think that the shape with the area of 6 cm2 will have 61
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