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
tino4ka555 [31]
3 years ago
14

Existe otra variable a tener en cuenta cuando de la aplicación de un trabajo se trata: el tiempo en que se aplica. Por ejemplo,

en el deporte de carreras de caballos se evidencia un ganador, así como el último en llegar. Si consideramos la misma trayectoria competitiva, podemos afirmar que los dos hicieron el mismo trabajo al llegar a la meta, sin embargo, el caballo ganador lo hizo más rápido. La magnitud física que permite determinar en qué difieren, entre el caballo ganador y el último en llegar, es la potencia. Entonces, ¿intervendrá la potencia muscular de los caballos?, ¿qué implica la magnitud que mide la rapidez con que se realiza un trabajo?, ¿se podrá generalizar a los motores, por ejemplo, de los vehículos? A continuación, los temas desarrollados ayudarán a la comprensión de esta nueva magnitud física.Rapidez para efectuar el trabajo: Sin duda alguna habrás observado en las construcciones el trabajo de las grúas para subir bloques hacia los pisos más altos. Considerando la figura, supongamos que disponemos de dos grúas para levantar bloques de un mismo peso y a la misma altura. En el momento de iniciar el desplazamiento vertical de la carga de bloques, se registra el tiempo y se advierte que la grúa de la izquierda se demoró menos tiempo. ¿Cuál crees que realizó más rápido el trabajo? Evidentemente la grúa de la izquierda. La medida de la rapidez para realizar un trabajo se denomina POTENCIA.
Physics
1 answer:
Bogdan [553]3 years ago
5 0

Answer: what

Explanation:

what

You might be interested in
The 20-g bullet is travelling at 400 m/s when it becomes embedded in the 2-kg stationary block. The coefficient of kinetic frict
nikklg [1K]

Answer:

The distance the block will slide before it stops is 3.3343 m

Explanation:

Given;

mass of bullet, m₁ = 20-g = 0.02 kg

speed of the bullet, u₁ =  400 m/s

mass of block, m₂ = 2-kg

coefficient of kinetic friction,  μk = 0.24

Step 1:

Determine the speed of the bullet-block system:

From the principle of conservation of linear momentum;

m₁u₁ + m₂u₂ = v(m₁ + m₂)

where;

v is the speed of the bullet-block system after collision

(0.02 x 400) + (2 x 0) = v (0.02 + 2)

8 = v (2.02)

v = 8/2.02

v = 3.9604 m/s

Step 2:

Determine the time required for the bullet-block system to stop

Apply the principle of conservation momentum of the system

v(m_1+m_2) -F_kt = v_f(m_1 +m_2)\\\\v(m_1+m_2) -N \mu_kt = v_f(m_1 +m_2)\\\\v(m_1+m_2) -g(m_1 +m_2) \mu_kt = v_f(m_1 +m_2)\\\\3.9604(2.02)-9.8(2.02)0.24t = v_f(2.02)\\\\8 - 4.751t = 2.02v_f\\\\3.9604 - 2.352t = v_f

when the system stops, vf = 0

3.9604 -2.352t = 0

2.352t = 3.9604

t = 3.9604/2.352

t = 1.684 s

Thus, time required for the system to stop is 1.684 s

Finally, determine the distance the block will slide before it stops

From kinematic, distance is the product of speed and time

S = \int\limits {v} \, dt \\\\S = \int\limits^t_0 {(3.9604-2.352t)} \, dt\\\\ S = 3.9604t - 1.176t^2

Now, recall that t = 1.684 s

S = 3.9604(1.684) - 1.176(1.684)²

S = 6.6693 - 3.3350

S = 3.3343 m

Thus, the distance the block will slide before it stops is 3.3343 m

3 0
3 years ago
Read 2 more answers
3.1 Two waves A and B have frequencies 256 Hz and 1024 Hz respectively have amplitude in ratio 3:1 1.What is their ratio of freq
scoundrel [369]

Answer:

1. the one with the raito

2. the one that stubbed their toe

Explanation:

8 0
2 years ago
A guyot is ________. A. any portion of the ocean floor that is topographically higher than surrounding sea floor B. an extinct o
Maksim231197 [3]

Answer:

c.an extinct oceanic hot-spot volcano that has subsided below sea level

Explanation:

- Marine geology defines a guyot as an isolated underwater volcanic mountain with a flat top more than 200m below the surface of the sea.

-The flat top is due to years of wave erosion.

-Guyots can form a chain of seamounts as the ocean plate of the Earth's crust moves slowly over a hot spot that remains stationary beneath the plate.

6 0
2 years ago
Calcula la resistencia atravesada por una corriente con una intensidad de
Reil [10]
Hhhgcfghhhhhhhhhhhhhgh
5 0
2 years ago
A player kick the soccer ball from ground level and send it flying at an angle of 30° at a speed of 26M/S. What is the maximum h
icang [17]
The answer would be 2.63. Your welcome. This has been changed to the correct answer.
7 0
3 years ago
Other questions:
  • What’s the maximum height of the second hill? Use your answer from part E and the formula PE=m•g•h to determine the answer. Assu
    8·2 answers
  • The advantage of nuclear power include the low production of air pollution and the fact that is not produce a toxic waste materi
    9·1 answer
  • Need help with both questions!
    7·1 answer
  • Help ill give you brainliest !!!
    10·1 answer
  • You wish to boil 1.9 kg of water, which has a specific heat capacity of 4186 J/kg-K. The water is initially at room temperature
    15·1 answer
  • List four conditions that may result in the emission of electrons from a conductor
    7·2 answers
  • If an element forms a 2+ ion, in which group of the periodic table would you expect to find it? A. 2 B. 1 O c. 17 D. 18​
    7·1 answer
  • What is the mass of an object that accelerates at 5 m/s2 when pushed with 100 N?
    14·1 answer
  • Our planet heats unevenly, explain how this affects wind patterns. Use the words sea breeze and land breeze please :)
    11·2 answers
  • Give an example of an object that has balanced forces acting on it.
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!