Question

Брусок массой 200 грамм под действием груза массой 100 грамм проходит из состояния покоя путь 40 см за 1 с. Найти коэффициент трения бруска о плоскость

Answer 1

Я так понял что в задаче есть что-то вроде блока и горизонтальный груз M под действием силы F=mg=0.1*10 = 1 Н движется из состояния покоя. 

Сила Трения Fтр= uMg= u*0.2*10= 2u 
Общая Сила , действующая на M   Fо= F - F тр = 1-2u
Ускорение a = Fо / M = (1-2u)/0.2= 5 - 10u
Путь S = at^2/2 = 0.4
(5-10u)/2=0.4
Коэффициент трения u=0.42

Answer 2

Calculation of the Coefficient of Friction

To find the coefficient of friction between the block and the surface, we can use the equation:

Coefficient of Friction (μ) = Force of Friction (F) / Normal Force (N)

The force of friction can be calculated using Newton's second law of motion:

Force of Friction (F) = Mass of the block (m) * Acceleration due to friction (a)

The normal force can be calculated as:

Normal Force (N) = Mass of the block (m) * Acceleration due to gravity (g)

Given: - Mass of the block (m) = 200 grams = 0.2 kg - Mass of the load (gruz) = 100 grams = 0.1 kg - Distance traveled (s) = 40 cm = 0.4 m - Time taken (t) = 1 s

First, let's calculate the acceleration due to friction (a) using the formula:

Acceleration due to friction (a) = Distance traveled (s) / Time taken (t)

Substituting the given values:

Acceleration due to friction (a) = 0.4 m / 1 s = 0.4 m/s^2 Next, let's calculate the normal force (N) using the formula:

Normal Force (N) = Mass of the block (m) * Acceleration due to gravity (g)

The acceleration due to gravity (g) is approximately 9.8 m/s^2.

Normal Force (N) = 0.2 kg * 9.8 m/s^2 = 1.96 N Now, we can calculate the force of friction (F) using the formula:

Force of Friction (F) = Mass of the block (m) * Acceleration due to friction (a)

Force of Friction (F) = 0.2 kg * 0.4 m/s^2 = 0.08 N

Finally, we can calculate the coefficient of friction (μ) using the formula:

Coefficient of Friction (μ) = Force of Friction (F) / Normal Force (N)

Coefficient of Friction (μ) = 0.08 N / 1.96 N ≈ 0.041

Therefore, the coefficient of friction between the block and the surface is approximately 0.041.

Please note that the calculations provided are based on the given information and assumptions.