A 72.0-kg person pushes on a small doorknob with a force of 5.00 N perpendicular to the surface of the door. The doorknob is located 0.800 m from axis of the frictionless hinges of the door. The door begins to rotate with an angular acceleration of 2.00 rad/s 2 . What is the moment of inertia of the door about the hinges?
Answers
Answer:
Moment of inertia will be
Explanation:
We have given mass of the person m = 72 kg
Radius r = 0.8 m
Force is given F = 5 N
Angular acceleration
Torque is given by
We know that torque is also given by
, here I is moment of inertia and
is angular acceleration
So
Related Questions
Calculate the work done by a 50.0 N force on an object as it moves 9.00 m, if the force is oriented at an angle of 135° from the direction of travel. Explain what your answer means in terms of the object’s energy.
What is the magnitude of a vector that has the following components: x = 32 m y = -59 m
While a roofer is working on a roof that slants at 37.0 ∘∘ above the horizontal, he accidentally nudges his 92.0 NN toolbox, causing it to start sliding downward, starting from rest. If it starts 4.25 m from the lower edge of the roof, how fast will the toolbox be moving just as it reaches the edge of the roof if the kinetic friction force on it is 22.0 N?
Write a paragraph or two (no more than 1 page) describing the misconception and then explain the correct physics by identifying the forces or physics concepts involved in simple terms, like you are talking to your 3rd grade sibling. Start with a question (will water fall out of the bucket when I stop rotating it?)Give the common answer that is incorrect (what does your intuition tell you should happen?).Explain what happens and why in simple terms (try practicing on an elementary student to make sure they understand).Use diagrams and sketches in your explanation and avoid using physics terms like rotational, centripetal, normal forces, tension, friction, acceleration, velocity, vectors, buoyancy, energy, kinetics, potential, heat capacity, etc.
b. 30.3 m/s
c. None of the above
Answers
Answer:
so initial speed of the rock is 30.32 m/s
correct answer is b. 30.3 m/s
Explanation:
given data
h = 15.0m
v = 25m/s
weight of the rock m = 3.00N
solution
we use here work-energy theorem that is express as here
work = change in the kinetic energy ..............................1
so it can be written as
work = force × distance ...................2
and
KE is express as
K.E = 0.5 × m × v²
and it can be written as
F × d = 0.5 × m × (vf)² - (vi)² ......................3
here
m is mass and vi and vf is initial and final velocity
F = mg = m (-9.8) , d = 15 m and v{f} = 25 m/s
so put value in equation 3 we get
m (-9.8) × 15 = 0.5 × m × (25)² - (vi)²
solve it we get
(vi)² = 919
vi = 30.32 m/s
so initial speed of the rock is 30.32 m/s
Answers
Answer:
Explanation:
Width of slit = 10⁻³ / 1200
d = 8.3 x 10⁻⁷ m
First order maxima will be observed at
x = λD/d
D = 75 cm = 75 x 10⁻² m
56.2 x 10⁻² = λ₁D/d
= λ₁ x 75 x 10⁻² / 8.3 x 10⁻⁷
λ₁ = 56.2 x 8.3 x 10⁻⁷ / 75
= 6.219 x 10⁻⁷ m
= 6219 A
Similarly
λ₂ = 65.9 x 8.3 x 10⁻⁷ / 75
= 7293 A
λ₃ = 93.5 x 8.3 x 10⁻⁷ / 75
= 10347 A
Answers
Answers
Answer:
# = 2L /λ
Explanation:
For this exercise we can use a direct proportion rule. If there is 1 wave in 1 wavelength in 2L wave how many lengths are there
# = 2L /λ 1 wave
let's calculate
# = 2L /λ
we see that the longer the wavelength the fewer waves fit in the container
1.
the noun that follows the verb and answers the questions
whom or what
linking verb
2. a word that expresses action
sentence
3. who or what the sentence is about
predicate noun
4.
a noun that indicates to or for whom or what something is
done
predicate adjective
5. follows a linking verb and renames the subject
direct object
subject
6. follows a linking verb and describes a subject
verb that joins a subject and a predicate noun or predicate
7.
adjective
indirect object
8. expresses a complete thought
verb
Answers
Answer:
Explanation:
No 1 is linked to the option provided at no 5.
A direct object is the noun that follows the verb and answers the question.
No 2 is linked to the option provided at no 8.
A verb is a word that expresses action.
No 3 is linked to the option provided at no 5.
The subject is what or whom the sentence is about.
No 5 is linked to the option provided at no 3.
A predicate noun follows a linking verb, and renames the subject.
No 6 is linked to the option provided at no 4.
A predicate adjective follows a linking verb, and describes a subject.
No 7 is linked to the option provided at no 1.
A linking verb joins a subject and a predicate.
No 8 is linked to the option provided at no 2.
A sentence expresses a complete thought....
Final answer:
The terms like direct object, verb, subject, indirect object, predicate noun, predicate adjective, and sentence are explained in the context of English grammar and matched to their definitions.
Explanation:
Here are the correct matches for the terms:
- The noun that follows the verb and answers the questions whom or what is typically referred to as the direct object.
- A word that expresses action is a verb.
- Who or what the sentence is about is known as the subject.
- A noun that indicates to or for whom or what something is done is an indirect object.
- Follows a linking verb and renames the subject is a predicate noun.
- Follows a linking verb and describes a subject is a predicate adjective.
- Expresses a complete thought is the definition for a sentence in the context of English grammar.
Learn more about English Grammar Terms here:
#SPJ2
Answers
In same manner, cold body will take the heat, and it's temperature will increase
Hope this helps!