The drum of the drying machine, having a diameter D = 196 m, rotates with an angular velocity w = 20 rad / s.

The drum of the drying machine, having a diameter D = 196 m, rotates with an angular velocity w = 20 rad / s. How many times is the force F, pressing the tissue against the wall, greater than the force of gravity mg acting on this tissue?

To determine the ratio of centrifugal force and gravity, we use the formula: Fts / Ft = m * ac / (m * g) = ω ^ 2 * R / g = ω ^ 2 * D / 2g.

Variables: ω – angular velocity of the drum of the used drying machine (ω = 20 rad / s); D – drum diameter (D = 196 m); g – acceleration due to gravity (g ≈ 9.8 m / s2).

Calculation: Fts / Ft = ω ^ 2 * D / 2g = 20 ^ 2 * 196 / (2 * 9.8) = 4000 r.

Answer: The fabric is pressed against the drum wall 4000 times stronger.