Answer:
Explanation:
Hola.
En este caso, dado el volumen y densidad de cada barra, podemos calcular el peso de cada una en toneladas con la correspondiente conversión de 1 ton = 1000 kg:
De este modo, si el camión resiste 10 toneladas, el número de barras resulta de la división entre la capacidad del camión y el peso por barra:
¡Saludos!
Answer:
a) 361.7 Hz
b) 318.1 Hz
c) 29.3 m/s
Explanation:
a) Speed of sound in 20 degrees celcius is 343 m/s.
Use v=wavelength*frequency to find wavelength.
343=wavelength*340
wavelegth=1.009 meters
Relative speed of waves to observer A = 343+22 = 365 m/s
Plug it back in.
365=1.009*F
F=361.7 Hz
b) Relative speed of waves to observer B = 343-22 = 321 m/s
Plug it back in.
321=1.009*F
F=318.1 Hz
c) STATIONARY CAR, so 369Hz=v/1.009. v=372.3, 372.3-343=29.3m/s!
Answer:
1300.80988 Nm
730.79206 kgm²
Explanation:
m = Mass of ladder = 23.8 kg
g = Acceleration due to gravity = 9.81 m/s²
L = Length of ladder = 9.08 m
F = Applied force = 260 N
= Angular acceleration = 1.78 rad/s²
I = Moment of inertia
Weight is given by
The center of gravity of the ladder lies at the center of the ladder
Torque will be
The net torque acting on the ladder is 1300.80988 Nm
Torque is also given by
The moment of inertia of the ladder is 730.79206 kgm²
Answer:
I = (5.71 i ^ + 6.99j ^) N s
Explanation:
The concept of impulse is very useful for problems where shocks occur, the impulse is equal to the change of moment of the system
I = Δp = m -m v₀
Let's fix an xy coordinate system, where y is vertical and we decompose the velocities
Initial
sin (-40) = / vo
cos (-40) = v₀ₓ / Vo
= 17.0 sin (-40)
= -10.93 m / s
Vox = 17 cos (-40)
Vox = 13.02 m / s
Final
sin 30 = / vf
cos 30 = / Vf
= 48.0 sin30
= 24.0 m / s
= 48 cos 30
= 41.57 m / s
Let's calculate the momentum on each axis
X axis
Iₓ = m -m
Iₓ = 0.200 (41.57 - 13.02)
Iₓ = 5.71 N s
Axis y
= m - m
= 0.2000 (24 - (-10.93))
= 6.99 N s
I = (5.71 i ^ + 6.99j ^) n s