1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
zzz [600]
4 years ago
11

a level physics moments question please explain how the answer to (a) is 7.5N and the answer to (b) is 5.7N​

Physics
1 answer:
Mkey [24]4 years ago
5 0

Explanation:

a) Sum of moments about the pivot:

∑τ = Iα

(10 kg × 10 m/s²) (0.3 m) + F (-0.4 m) = 0

F = 75 N

b) Sum of moments about the pivot:

∑τ = Iα

(20 N) (0.3 m) + (20 N) (-0.2 m) + F (-0.7 m) = 0

6 Nm − 4 Nm + F (-0.7 m) = 0

F = 2.9 N

You might be interested in
On a cross-country trip, a couple drives 500 mi in 10 h on the first day, 380 mi in 8.0 h on the second day, and 600 mi in 15 h
Zepler [3.9K]

We know that the average speed is simply the ratio of the total distance travelled over the total duration of the trip.

total distance = 500 mi + 380 mi + 600 mi

total distance = 1,480 mi

 

total time = 10 h + 8 h + 15 h

total time = 33 h

 

So the average speed is therefore:

average speed = 1,480 mi / 33 h

<span>average speed = 44.85 mi / h</span>

8 0
3 years ago
Un camion se mișcă cu viteză constantă și are impulsul de 500Ns. Într-un interval de timp de 2s impulsul său se dublează. Aflați
zysi [14]

Answer:

250N

Explanation:

Given parameters:

Impulse  = 500Ns

Time of action = 2s

Unknown:

The force that produced the impulse  = ?

Solution:

The impulse on a body can be derived using the expression below;

    Impulse  = Force x time

 Now, to find the force;

         500  = Force x 2

              Force  = 250N

5 0
3 years ago
A body of mass 2kg is thrown up with a speed of 25m/s. Find its maximum potential<br> energy.
yKpoI14uk [10]

Answer: Maximum potential energy of body is 625 joule

Explanation: Maximum potential energy = initial kinetic energy

= 0.5 mv^2

= 0.5 multiply 2 kg multiply (25 m/s)^2

=625 joule

8 0
3 years ago
Identify the examples of values. select three options. inez thinks it is important to be honest with her friends. molly was rais
Hatshy [7]

Inez believes it is critical to be truthful with her friends

Byron makes an effort to respect everyone.

Lydia is concerned with using her creativity.

<h3>What are values?</h3>
  • Your values are the things you hold dear in terms of how you live and do business.
  • Your priorities should be based on them, and you presumably use them to gauge whether your life is going in the direction you want it to go.

<h3>What are some instances of values?</h3>
  • Spirituality.
  • Humility.
  • Compassion.
  • Honesty.
  • Kindness.
  • Integrity.
  • Selflessness.

<h3>What are a person's values?</h3>
  • Your ability to distinguish between "good" and "bad" in your neighborhood, society, or culture depends on your personal values.
  • They are the behaviors that you consider to be the best examples, such as honesty and patience.
  • You undoubtedly live by certain guiding principles that influence how you make decisions, establish goals, and behave in general.

<h3>What are moral principles?</h3>
  • Moral principles are described as rules that help a person distinguish between good and wrong.
  • The awareness of one's values is essential, as is self-consciousness, in order to form honest, reliable, and fair judgments and interactions in daily life.

To learn more about moral values visit:

brainly.com/question/14292511

#SPJ4

8 0
1 year ago
27 degrees to kelvin, 20 dg to milligrams, and 3 to decimeters.
Gala2k [10]
K = C + 273, so 27°C = 27+273 = 300 K

1 dg = 100 mg, so 20 dg = 20×100 = 2,000 mg
7 0
3 years ago
Other questions:
  • Sea and land breezes are caused because ____.
    7·2 answers
  • A motorboat heads due east at 16 m/s across a river that flows due south at 9.0 m/s. a.) What is the resultant velocity of the b
    14·1 answer
  • For the electric power transmission system shown in the figure above, what is the ratio ns/np for the step-up transformer? assum
    15·1 answer
  • Which organs are used in reproduction?
    14·1 answer
  • If a truck is heading south at a velocity of 90m/s for 10 seconds how far did it travel?
    9·1 answer
  • The earth rotates once per day about an axis passing through the north and south poles, an axis that is perpendicular to the pla
    12·1 answer
  • Which of the following does Archimedes' principle help to explain?
    9·2 answers
  • An electrical device in which a long wire is wound into a succession of closely spaced loops around a n insulating core is calle
    11·1 answer
  • Dylan has two cubes of iron. The larger cube has twice the mass of the smaller cube. He measures the smaller cube. Its mass is 2
    12·1 answer
  • A car is travelling at a velocity of 20m/s. After 30sec it covers a distance of 1200 m. Calculate the acceleration of the car an
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!