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
Stolb23 [73]
3 years ago
11

Un niño amarra una soga a una piedra, y la hace girar como en la gráfica. la piedra realiza un M.C.U, girando con una rapidez de

14 rad/s. calcular el ángulo que barre en 4 segundos.
Physics
1 answer:
inessss [21]3 years ago
4 0

Answer:

\Delta \theta = 56\,rad

\Delta \theta \approx 3208.564^{\circ}

Explanation:

El ángulo barrido en el intervalo de tiempo dado es (The covered angle in the given time interval is):

\Delta \theta = \omega \cdot \Delta t

\Delta \theta = \left(14\,\frac{rad}{s} \rjght)\cdot (4\,s)

\Delta \theta = 56\,rad

\Delta \theta \approx 3208.564^{\circ}

You might be interested in
A particle travels along the x-axis in such a way that its acceleration at time t is a(t) = t + t2. if it starts at the origin w
Olegator [25]
The acceleration of the particle as a function of time t is
a(t) = t + t^2
The velocity of the particle at time t is the integral of the acceleration:
v(t) =  \int {a(t)} \, dt =  \frac{t^2}{2} +  \frac{t^3}{3}  + C
where the constant C can be found by requiring that the velocity at time t=0 is v=3:
v(0) = 3
and we find C=v_0=3
so the velocity is
v(t)=3+ \frac{t^2}{2}+ \frac{t^3}{3}

The position of the particle at time t is the integral of the velocity:
x(t)=\int {v(t) } \,dt = 3t +  \frac{t^3}{6}+ \frac{t^4}{12}   +D
where D can be found by requiring that the initial position at time t=0 is zero:
x(0)=0
from which we find D=0, so 
 x(t)=3t + \frac{t^3}{6}+ \frac{t^4}{12} 

To solve the problem, now we just have to substitute t=5 into x(t) and v(t) to find the position and the velocity of the particle at t=5.

The position is:
x(5)=3(5) +  \frac{5^3}{6}+ \frac{5^4}{12}=87.92
and the velocity is:
v(5) = 3+ \frac{5^2}{2}+ \frac{5^3}{3}=57.17
6 0
3 years ago
While skydiving, your parachute opens and you slow from 50.0 m/s to 8.0 m/s in 0.75 s . Determine the distance you fall while th
Anestetic [448]

Answer:

21.75 m

Explanation:

t = Time taken for the car to slow down = 0.75 s

u = Initial velocity = 50 m/s

v = Final velocity = 8 m/s

s = Displacement

a = Acceleration

Equation of motion

v=u+at\\\Rightarrow a=\frac{v-u}{t}\\\Rightarrow a=\frac{8-50}{0.75}\\\Rightarrow a=-56\ m/s^2

Acceleration is -56 m/s²

v^2-u^2=2as\\\Rightarrow s=\frac{v^2-u^2}{2a}\\\Rightarrow s=\frac{8^2-50^2}{2\times -56}\\\Rightarrow s=21.75\ m

The distance covered in the 0.75 seconds is 21.75 m

8 0
3 years ago
In Shinto, there is s strong emphasis on purification and recognition of the role environment plays in creating harmony. Explore
Savatey [412]

Answer:

Explanation:

i have no idea

8 0
3 years ago
Stability is a term that means... 
Aleksandr-060686 [28]
The correct answer is A
7 0
2 years ago
Х
Ganezh [65]

Answer:

A. topsoil the answer

Explanation:

I think its a correct answer

3 0
2 years ago
Other questions:
  • a spacecraft is flying towards the moon using your knowledge of gravitational force explain the moon's gravitational pull on the
    9·1 answer
  • Which statement would be the best evidence that heat transfer through radiation has occurred and why? A) A pan gets hot on a sto
    10·2 answers
  • When one of the two planes of vibration of a light wave is blocked, the resulting wave is called
    15·2 answers
  • What is the frequency of a wave having a period Equal to 18 seconds
    6·1 answer
  • what are two benefits of scientists using a diagram to model the water cycle A It can Show changes that Occur in many Diffrent p
    6·1 answer
  • A neighborhood transformer on the top of a utility pole transforms 12.0 kV 60.0 Hz alternating voltage down to 120.0 V to be use
    13·1 answer
  • Puedo violar a mi hermana?
    14·1 answer
  • Suggest two ways in which the boy could balance the beam?
    12·2 answers
  • A scientist measuring the resistivity of a new metal alloy left her ammeter in another lab, but she does have a magnetic field p
    8·1 answer
  • What year did niels bohr discover the atomic theory​
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!