Question

колесо велосипеда имеет радиус 40 см.С какой скоростью едет велосипедист если колесо делает 120 об/мин.Чему равен период вращения колеса? Найти центросремительное ускорение

Answer 1

Calculation of Speed:

To calculate the speed at which the cyclist is traveling, we can use the formula:

Speed = Circumference of the wheel × Number of revolutions per minute

The circumference of the wheel can be calculated using the formula:

Circumference = 2π × Radius

Given that the radius of the wheel is 40 cm, we can calculate the circumference as follows:

Circumference = 2π × 40 cm

Now, we need to convert the circumference to meters to maintain consistent units. Since 1 meter is equal to 100 centimeters, the circumference in meters is:

Circumference = (2π × 40 cm) / 100

Next, we can substitute the calculated circumference into the speed formula along with the given number of revolutions per minute (120):

Speed = ((2π × 40 cm) / 100) × 120

Let's calculate the speed using the given values:

Speed = ((2π × 40 cm) / 100) × 120

Using the value of π as approximately 3.14, we can calculate the speed.