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nikitadnepr [17]
3 years ago
12

An electric saw uses a circular spinning blade to slice through wood. When you start the saw, the motor needs 2.00 seconds of co

nstant angular acceleration to bring the blade to its full angular velocity. If you change the blade so that the rotating portion of the saw now has 3.00 times its original rotational mass, how long will the motor need to bring the blade to its full angular velocity
Physics
1 answer:
liberstina [14]3 years ago
7 0

Answer:

6 seconds

Explanation:

So suppose the new saw has the same mass distribution, only difference in mass density, then the moment of the new saw would be 3 times the original ones.

Suppose both saws are under the same torque, by Newton's 2nd law, we have the following equation of angular acceleration related to torque T and moment of inertia I:

\alpha = \frac{T}{I}

So if I is tripled while T stays the same, α would have been reduced 3 times

So to achieve the full angular velocity:

\omega = \alpha t

Now that angular acceleration is reduced 3 times. The time it takes would have to be 3 times as much, or 2 * 3 = 6 seconds.

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What is the most important consideration for environmental policy makers?
Nutka1998 [239]
The most important consideration for environmental policy makers would be : environmental health
The basic purpose in creating environmental policy is maintaining the health of the population. the policies that created by the policy makers should be created to prevent any type of damage to population's well being

hope this helps
8 0
3 years ago
How much work does a student (m = 60 kg) do when he Climb a tower 80 m high?
gtnhenbr [62]

Answer:

W = 47040  J

Explanation:

Given that,

The mass of a student, m = 60 kg

Height of the tower, h = 80 m

We need to find the work done in climbing the tower. The work done is given by :

W = mgh

So,

W = 60 × 9.8 × 80

W = 47040  J

So, the required work done is 47040  J.

7 0
3 years ago
Dr. Smith is conducting an experiment to determine if paintings of landscapes produce more peaceful feelings than abstract paint
skad [1K]

The option that could be the hypothesis for this experiment is that D. Abstract paintings may elicit feelings of stress as students try to determine the meanings of the paintings; therefore, abstract paintings may cause college students to report lower feelings of peace.

<h3>What is a hypothesis?</h3>

It should be noted that a hypothesis simply means the proposed explanation made on the basis of limited evidence.

From the information, Smith is conducting an experiment to determine if paintings of landscapes produce more peaceful feelings than abstract paintings.

Therefore, the option that could be the hypothesis for this experiment is that abstract paintings may elicit feelings of stress as students try to determine the meanings of the paintings; therefore, abstract paintings may cause college students to report lower feelings of peace.

Learn more about hypothesis on:

brainly.com/question/11555274

#SPJ1

3 0
2 years ago
Help, please. I am not sure what to do.
miss Akunina [59]

Answer:

option D) -3m

Explanation:

if 6m is diplaced by -3m then it would be -3+6=3m

feel free to ask if you are confused

3 0
2 years ago
Which of the following is not a subatomic particle?
Fynjy0 [20]
D. Nucleus because it is not a part of the group.
7 0
3 years ago
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