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
Nataliya [291]
2 years ago
13

Dimas reads that it takes 270 N to lift a firefighter's equipment. If a firefighter does 5400 J of work carrying the equipment u

p a staircase, how high does the firefighter climb? (Work: W = Fd) 20 m 200 m 5130 m 1,458,000 m
Physics
2 answers:
Alex787 [66]2 years ago
7 0

Answer:

h = 20 m

Explanation:

Given that,

Force to lift a firefighter's equipment, F = 270 N

Work done, W = 5400 J

We need to find the height climbed by the firefighter. We know that,

Work done, W = Fd

So,

d=\dfrac{W}{F}\\\\d=\dfrac{5400}{270}\\\\d=20\ m

So, the firefighter climb from a height of 20 m.

hodyreva [135]2 years ago
7 0

Answer:

Its A

Explanation: I got it right on Edge *lip bite*

You might be interested in
Wax, like all matter, comes in many phases. What are the three possible
Levart [38]
A b and c its so simple bro send it 23-89
7 0
2 years ago
A wheel moves in the xy plane in such a way that the location of its center is given by the equations xo = 12t3 and yo = R = 2,
Stella [2.4K]

Answer:

the velocity of the point P located on the horizontal diameter of the wheel at t = 1.4 s  is   P =  104.04 \hat{i} -314.432 \hat{j}

Explanation:

The free-body  diagram below shows the interpretation of the question; from the diagram , the wheel that is rolling in a clockwise directio will have two velocities at point P;

  • the peripheral velocity that is directed downward (-V_y) along the y-axis
  • the linear velocity (V_x) that is directed along the x-axis

Now;

V_x = \frac{d}{dt}(12t^3+2) = 36 t^2

V_x = 36(1.7)^2\\\\V_x = 104.04\ ft/s

Also,

-V_y = R* \omega

where \omega(angular velocity) = \frac{d\theta}{dt} = \frac{d}{dt}(8t^4)

-V_y = 2*32t^3)\\\\\\-V_y = 2*32(1.7^3)\\\\-V_y = 314.432 \ ft/s

∴ the velocity of the point P located on the horizontal diameter of the wheel at t = 1.4 s  is   P =  104.04 \hat{i} -314.432 \hat{j}

3 0
3 years ago
A 350-g mass is attached to a spring whose spring constant is 64 N/m. Its maximum acceleration is 5.3 m/s2. What is the frequenc
max2010maxim [7]

The frequency of oscillation is 2.153 Hz

What is the frequency of spring?

Spring Frequency is the natural frequency of spring with a weight at the lower end. Spring is fixed from the upper end and the lower end is free.

For the mass-spring system in this problem,

The Frequency of spring is calculated with the equation:

f = \frac{1}{2\pi } \sqrt{\frac{k}{m} }

Where,

f = frequency of spring

k = spring constant = 64 N/m

m = mass attached to spring = 350g = 0.350 kg

a = maximum acceleration = 5.3 m/s^2

Substituting the values in the equation,

f = \frac{1}{2\pi } \sqrt{\frac{64}{0.350} }

f = \frac{1}{2\pi } ( 13.522)

f = 2.1535 Hz

Hence,

The frequency of oscillation is 2.153 Hz

Learn more about frequency here:

<u>brainly.com/question/13978015</u>

#SPJ4

6 0
1 year ago
Where do you think the government should put the greatest support: solar energy, wind energy, clean coal, oil exploration, gas e
True [87]
The government should put it support in a combination of sources, as no source in the present can fully provide all energy requirements.
7 0
3 years ago
Read 2 more answers
What is formed when 2 or more elements combine chemically
ira [324]

Answer:

compound

Explanation:

a substance made from two or more different elements that have been chemically joined. Examples of compounds include water (H2O), which is made from the elements hydrogen and oxygen, and table salt (NaCl), which is made from the elements sodium and chloride.

6 0
2 years ago
Other questions:
  • A vehicle traveling at a steady speed takes 4 hours to travel 244 km. calculate the average speed of this vehicle.
    8·1 answer
  • In 1781 with a reflecting telescope, Sir William Herschel discovered the planet WHAT
    14·2 answers
  • What carved the sharp features of this mountain
    9·2 answers
  • 3. To calculate the _____ of a moving object, divide the displacement by the time interval in which the displacement occurred.
    11·2 answers
  • Please answer this I'm sorry for annoying you
    7·1 answer
  • Define volume with example​
    15·2 answers
  • On a distance-time graph, which is your independent and dependent variable?
    7·2 answers
  • Can someone help me with this​
    13·1 answer
  • Why are carbon brushes used? How do these work?
    12·2 answers
  • The total amount of revenue collected from $1 per unit tariff on this product will be?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!