Only the horizontal component of the tension force is performing work on the crate. This component has magnitude (50 N) cos(30°) = 25√3 N, so the work done is
(25√3 N) (10 m) = 250√3 N•m ≈ 433 J
<u>The Weight </u>is a vector whose magnitude is the product of the mass m of the object and the magnitude of the local gravitational acceleration. Its always directed toward the center of the Earth.
Answer:
Explanation:
V = I R
V = 0.0418 * 30
V = 1.254
this battery seems dead :P
Answer:
D) 8.0 s.
Explanation:
(The following exercise is written in Spanish. Hence, explanations will be held in such language.)
La energía requerida para elevar el ascensor es el cambio en la energía potencial gravitacional, cuya magnitud es:
![\Delta E_{g} = (200\,kg)\cdot \left(9.807\,\frac{m}{s^{2}} \right)\cdot (20\,m)](https://tex.z-dn.net/?f=%5CDelta%20E_%7Bg%7D%20%3D%20%28200%5C%2Ckg%29%5Ccdot%20%5Cleft%289.807%5C%2C%5Cfrac%7Bm%7D%7Bs%5E%7B2%7D%7D%20%5Cright%29%5Ccdot%20%2820%5C%2Cm%29)
![\Delta E_{g} = 39228\,J](https://tex.z-dn.net/?f=%5CDelta%20E_%7Bg%7D%20%3D%2039228%5C%2CJ)
Ahora, la potencia media es el resultado anterior dividido por el tiempo. Se despeja el tiempo de la ecuación:
![\Delta t = \frac{\Delta E_{g}}{\dot W}](https://tex.z-dn.net/?f=%5CDelta%20t%20%3D%20%5Cfrac%7B%5CDelta%20E_%7Bg%7D%7D%7B%5Cdot%20W%7D)
![\Delta t = \frac{39228\,J}{5000\,W}](https://tex.z-dn.net/?f=%5CDelta%20t%20%3D%20%5Cfrac%7B39228%5C%2CJ%7D%7B5000%5C%2CW%7D)
![\Delta t = 7.846\,s](https://tex.z-dn.net/?f=%5CDelta%20t%20%3D%207.846%5C%2Cs)
La opción más aproximada es D.
Answer:
option D
Explanation:
the correct answer is option D
acceleration of a body under free fall due to the effect of gravity is the called acceleration due to gravity.
Acceleration due to gravity is a constant value.
According to the International System of Measurements the acceleration due to gravity is 9.81 m/s² when an object falls vertically.
acceleration due to gravity is denoted by 'g'.