Which statement accurately describes a balanced force?
1 answer:
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Answer:
Explanation:
A car travels 6.0 km to the north and then 8.0 km to the east. The intensity of the position vector, in relation to the starting point is: a) 14 km b) 2.0 km c) 12 km d) 10 km e) 8.0 km
Check attachment for diagram
The intensity of the position vector is equal to the displacement,
So, to calculate the displacement, we need to find the length of the straight line from starting point to end point.
So, applying Pythagorean theorem
c² = a² + b²
R² = 6² + 36²
R² = 36 + 64
R² = 100
R = √100
R = 10 km.
Verifique el adjunto para ver el diagrama
La intensidad del vector de posición es igual al desplazamiento,
Entonces, para calcular el desplazamiento, necesitamos encontrar la longitud de la línea recta desde el punto inicial hasta el punto final.
Entonces, aplicando el teorema de Pitágoras
c² = a² + b²
R² = 6² + 36²
R² = 36 + 64
R² = 100
R = √100
R = 10 km.
Answer:
The value of x is
The value of the velocity at the top is
Explanation:
The diagram of this process is on the first uploaded image
From the question we are told that
The mass of the block is
The distance of compression is
The force constant is
The radius of the circular track is
The speed at the bottom of the track is
The frictional force experienced is
Now looking at this process we see that the potential energy of the spring is been transformed into the kinetic energy of the block . So,
mathematically i.e
Making x the subject of the formula
The average workdone by friction is
Here
The kinetic energy at the bottom is
The potential energy gained at the top of the circle is
Here h is the height which is equal to d(diameter) = 2r = 2 × 1 = 2 m and
g is acceleration due to gravity
Now substituting values
Since energy is can not be created nor destroyed but transformed according to first law of thermodynamics
