The whole secret of things that are balanced on a pivot like this is:
The sum of all of the 'moments' is equal on both sides.
The moment of each weight is (the weight) times (its distance from the pivot).
If you add up those for each eight on one side, it has to be equal to the sum
of all the ones on the other side.
<u>2. a).</u>
The moments on the right side are: (4 x 0.15) and (1 x 0.40).
They add up to (0.60 + 0.40) = 1.00
The only moment on the left side is (C x 0.25). Both sides have to be equal.
C x 0.25 = 1.00
Divide each side by 0.25, and you have C = 4 N .
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<u>2. b).</u>
The only moment on the left side is (5 x 0.40) = 2.00
The moments on the right side are (1 x 0.20) and (D x 0.30)
They add up to (0.3D + 0.2).
Both sides have to be equal. 0.3D + 0.2 = 2.0
Subtract 0.2 from each side: 0.3D = 1.8
Divide each side by 0.3: D = 6 N
Answer:
Part a)
m = 232.1 gram
Part b)
M = 928.6 gram
Explanation:
Part a)
As we know that frequency of vibration for a given spring block system is given by formula
so if it is given as 0.90 Hz then we will have
Now if additional mass is attached with it the frequency changed to 0.50 Hz
now divide two equations
Part b)
Now the frequency is changed to 0.45 Hz
so again we will have
again divide it with first equation above
as we know that m = 232.1 g
so total mass needed for 0.45 Hz will be
<span>the overload principle hope this helps
</span>
Answer:
Time taken to reach the tree
they have given the maximum height which is 25m
therefore...
v=u+at (upward)
0 = 45sin(20)-9.81t
t = 1.56s
We have and .
Calculate force (weight) by using .
Hope this helps.