Answer:
n = 1000 pulses
Explanation:
Given that,
The frequency of a pulse waveform,
To find,
The number of pulses counted during 100 ms.
Solution,
The frequency of a pulse waveform is equal to the number of pulses per unit time. It is given by :
n = 1000 pulses
So, there are 1000 pulses counted in a pulse waveform.
Answer:
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0.15
Explanation:
Given parameters:
Mass of bookcase = 41kg
Force applied = 65N
Acceleration = 0.12m/s²
Unknown:
Coefficient of kinetic friction between the bookcase and carpet = ?
Solution:
To solve this problem, the forces acting on the bookcase are;
frictional force
net force
applied force
weight
F - f = ma in the horizontal direction ----- i
F is the applied force
f is frictional force
m is the mass
a is the acceleration
ma is the net force
In the vertical axis:
R = mg
R is the normal reaction
mg is the weight of the body
f = μN = μmg , put into equation i
F - μmg = ma
μ is the coefficient of friction
input the variables;
65 - μ(41 x 9.8) = 41 x 0.12
65 - 401.8μ = 4.92
- 401.8μ = 4.92 - 65
- 401.8μ = -60.1
μ = = 0.15
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Friction brainly.com/question/6443626
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