Two skaters stand on ice. One weighs 250 N, and the other weighs 500 N. They push
against each other and move in opposite direc-
tions. Describe the momentum of each skater
after they push away from each other.

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Ответ:

evere11605

08.03.2023

Physics

$\sigma=3.38\times 10^{-6}\ C/m^2$

Explanation:

Given that,

Mass of the amber bead, m = 12.6 g = 0.0126 kg

Charge on the bead, $q=-0.646\ \mu C=-0.646\times 10^{-6}\ C$

The electric field due to infinite large plastic sheet is given by :

$E=\dfrac{\sigma}{2\epsilon_o}$

At equilibrium, q E = m g

$\dfrac{q \sigma}{2\epsilon_o}=mg$

where

$\sigma$ is the charge per unit area on the glass sheet.

$\sigma=\dfrac{2mg\epsilon_o}{q}$

$\sigma=\dfrac{2\times 0.0126 \times 9.8\times 8.85\times 10^{-12}}{-0.646\times 10^{-6}}$

$\sigma=-3.38\times 10^{-6}\ C/m^2$

So, the charge per unit area on the glass sheet is ( $-3.38\times 10^{-6}\ C/m^2$ ). Hence, this is the required solution.

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Two skaters stand on ice. One weighs 250 N, and the other weighs 500 N. They push against each other and move in opposite direc- tions. Describe the momentum of each skater after they push away from each other.