A 0.47-kg block is hung from and stretches a spring that is attached to the ceiling. A second block is attached to the first one, and the amount that the spring stretches from its unstretched length triples. What is the mass of the second block

Respuesta :

Answer:

The mass of the second block is 0.94 kg

Explanation:

Given;

mass of the first block, m₁ = 0.47 kg

let the mass of the first block and second block = m₂

According to Hook's law;

F = kx

where;

F is the applied load (force)

k is the elastic constant

x is the extension of the elastic material

According to Newton's law of motion;

F = ma = mg

Thus,

mg = kx

[tex]k = \frac{mg}{x} \\\\\frac{m_1g}{x_1} = \frac{m_2g}{x_2} \\\\But, x_2 \ is \ triple \ of \ x_1,\\x_2 = 3x_1\\\\\frac{m_1g}{x_1} = \frac{m_2g}{3x_1}\\\\\frac{m_1}{x_1} = \frac{m_2}{3x_1}\\\\Substitute \ in \ the \ value \ of \ m_1\\\\\frac{0.47}{x_1} = \frac{m_2}{3x_1}\\\\\frac{0.47}{1} = \frac{m_2}{3}\\\\m_2 = 3 *0.47\\\\m_2 = 1.41 \ kg[/tex]

mass of the second block alone = 1.41 - 0.47 = 0.94 kg

Therefore, the mass of the second block is 0.94 kg