Answer:
Number of revolutions = Δθ = 60.63 revs
Explanation:
The angular acceleration of the washer is given by
α = (ωf - ωi)/Δt
Where ωf is the initial angular speed, ωi is the final angular speed and Δt is the interval of time during this acceleration.
α = (4.7 - 0)/8.3
α = 0.56 rev/s²
As we know from the equation of kinematics,
2αΔθ = ωf² - ωi²
Where Δθ is the change in angular displacement of the washer.
Δθ = (ωf² - ωi²)/2α
Δθ = (4.7² - 0²)/2*0.56
Δθ = 19.72 revs
Now the tub decelerates and comes to a stop in 17.5 s
α = (ωf - ωi)/Δt
α = (-4.7 - 0)/17.5
α = -0.27 rev/s²
the corresponding change in angular displacement of the washer is
Δθ = (ωf² - ωi²)/2α
Δθ = (0² - 4.7²)/2*-0.27
Δθ = 40.91 revs
Therefore, the total number of revolutions undergone by the tub during this entire time interval is
Δθ = 19.72 + 40.91
Δθ = 60.63 revs
Answer:
The displacement of the car is 10 km at an angle of 36.9 degrees.
Explanation:
(AP) A car travels 8.00 km west from A to B; then the car travels 6.0 km north from B to C. Calculate the total displacement of the car? to. 10 km 36.9 ° b. 10 km 34.8 ° c. 12 km 34.8 ° d. 12 km 34.8 ° e. 12 km 35.9 °
It is given that,
A car travels 8.00 km west from A to B
The car travels 6.0 km north from B to C
We need to find the total displacement of the car. Initially, the car is moving due west and then it moves due north. So, the displacement of the car is given by :
To find angle,
So, the displacement of the car is 10 km at an angle of 36.9 degrees.
Neuron and muscle cells have plasma membranes that undergo voltage changes in response to stimuli.
<h3>What is a neuron?</h3>
Neurons are messengers of information.
Between various brain regions and between the brain and the rest of the nervous system, information is transmitted using electrical impulses and chemical signals.
A neuron has a cell body that includes a nucleus and cytoplasm, from which long, thin hair-like structures emerge.
The axon, a solitary long component of the neuron, is responsible for carrying the nerve impulse to various body areas.
The dendrites are the neuron's small, branching body sections.
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Answer:
Part a)
Part b)
Magnitude of the force is given as
Part c)
As we know that Y component of the force is negative so here the force is directed below the X axis
Explanation:
Part a)
Adrienne apply the force of 20 N along +X direction and Jim apply force of 40 N at 53 degree above negative X axis
so we will have
now let say the force exerted by Luis is F such that sum of all forces must be zero
now we have
so we have
Part b)
Magnitude of the force is given as
Part c)
As we know that Y component of the force is negative so here the force is directed below the X axis
So here we have
Work needed: 720 J
Explanation:
The work needed to stretch a spring is equal to the elastic potential energy stored in the spring when it is stretched, which is given by
where
k is the spring constant
x is the stretching of the spring from the equilibrium position
In this problem, we have
E = 90 J (work done to stretch the spring)
x = 0.2 m (stretching)
Therefore, the spring constant is
Now we can find what is the work done to stretch the spring by an additional 0.4 m, that means to a total displacement of
x = 0.2 + 0.4 = 0.6 m
Substituting,
Therefore, the additional work needed is
Learn more about work:
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