What weight was put on a wooden block, the mass of which was 300 g, if the friction force was equal to 2N
| February 1, 2021 | education
What weight was put on a wooden block, the mass of which was 300 g, if the friction force was equal to 2N when moving on a horizontal table? Sliding friction coefficient 0.4
mb = 300 g = 0.3 kg.
g = 9.8 m / s ^ 2.
μ = 0.4.
F = 2 N.
mg -?
F = μ * (mb + mg) * g.
mg = (F – μ * mb * g) / μ * g.
mg = (2 N – 0.4 * 0.3 kg * 9.8 m / s ^ 2) / 0.4 * 9.8 m / s ^ 2 = 0.21 kg.
Answer: mg = 0.21 kg.
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