Pasco Scientific ME-9429A, Инструкция по эксплуатации и руководство по экспериментам

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8
Dynamics Cart Accessory Track Set 012-05035E
➁
For each of the following cases, place the two carts against each other with the plunger of the
Dynamics Cart pushed completely in and latched in its maximum position (see Figure 1.1).
➂
Push the plunger release button with a short stick and watch the two carts move to the ends of
the track. Experiment with different starting positions until the two carts reach their respective
ends of the track at the same time. Then weigh the two carts and record the masses and the
starting position in Table 1.1.
CASE 1: CARTS OF EQUAL MASS (Use two carts without any additional mass bars)
CASE 2: CARTS OF UNEQUAL MASS (Put one mass bar in one cart, none in the other)
CASE 3: CARTS OF UNEQUAL MASS (Put two mass bars in one cart, none in the other)
CASE 4: CARTS OF UNEQUAL MASS (Put two mass bars in one cart, one mass bar in
the other)
Table 1.1
Data Analysis
➀
For each of the cases, calculate the distances traveled from the starting position to the end of
the track. Record the result in Table 1.1.
➁
Calculate the ratio of the distances traveled and record in the table.
➂
Calculate the ratio of the masses and record in the table.
Questions
➀
Does the ratio of the distances equal the ratio of the masses in each of the cases? In other
words, is momentum conserved?
➁
When carts of unequal masses push away from each other, which cart has more momentum?
➂
When the carts of unequal masses push away from each other, which cart has more kinetic
energy?
➃
Is the starting position dependent on which cart has its plunger cocked? Why?
Mass 1 Mass 2 Position x
1
x
2
x
1
/ x
2
m
2
/m
1