When is the earth said to be at perihelion
2 answers:
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Answer:
F = 180 N
Explanation:
To find the required force you first calculate the angle of the ramp, by using the following relation:
Next, you use the Newton second law to know what is the x component (in a rotated coordinate system) of the gravitational force:
the required force must be, at least, the last force Fx. You know that the weight of the object is 490N = mg. Hence, you have:
the required force is 180N
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TRANSLATION:
Para encontrar la fuerza requerida, primero calcule el ángulo de la rampa, utilizando la siguiente relación:
Luego, usa la segunda ley de Newton para saber cuál es el componente x (en un sistema de coordenadas girado) de la fuerza gravitacional:
la fuerza requerida debe ser, al menos, la última fuerza Fx. Sabes que el peso del objeto es 490N = mg. Por lo tanto, tienes:
Answer:
<em>The car took 3 hours to travel 180 miles</em>
Explanation:
<u>Constant Speed Motion</u>
An object travels at constant speed if the ratio of the distance traveled by the time taken is constant.
Expressed in a simple equation, we have:
Where
v = Speed of the object
d = Distance traveled
t = Time taken to travel d.
From the equation above, we can solve for t:
The car travels at v=60 mi/h for a distance of d=180 miles. The time taken is:
t = 3 hours
The car took 3 hours to travel 180 miles