Question

Вал диаметром 20см делает оборот за 2с. Определите линейную скорость точек на его поверхности. ОЧЕНЬ СРОЧНО!

Answer 1

V=2ПR/T
R= диаметр/2
R=0,2м/2= 0,1м
V=2* 3,14*0,1м/2с=0,314м/с

Answer 2

Calculating Linear Speed of a Wheel

To calculate the linear speed of a point on the surface of the wheel, we can use the formula:

Linear speed = (2 * π * r) / T

Where: - r = radius of the wheel - T = time taken for one revolution

Given: - Diameter of the wheel (d) = 20 cm - Radius of the wheel (r) = d / 2 = 10 cm - Time taken for one revolution (T) = 2 s

Calculation

Using the formula, we can calculate the linear speed of a point on the surface of the wheel:

Linear speed = (2 * π * 10) / 2

Linear speed = π * 10

Result

The linear speed of a point on the surface of the wheel is 10π cm/s.