Question

Какова скорость автомобиля если его колесо радиус которого 30 см за секунду делает 10 оборотов

Answer 1

V=w*R=2*pi*n*R=6,28*10*0,3=18,84 м/с

Answer 2

Calculating the Speed of the Car

To calculate the speed of the car, we can use the formula:

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

The circumference of the wheel can be calculated using the formula: Circumference = 2 × π × radius

Given that the radius of the wheel is 30 cm and it makes 10 revolutions per second, we can calculate the speed using the above formulas.

Calculation

The first step is to calculate the circumference of the wheel: Circumference = 2 × π × 30 cm

Next, we can calculate the speed using the circumference and the number of revolutions per second: Speed = Circumference × 10 revolutions/second

Result

By plugging in the values and performing the calculations, we find that the speed of the car is approximately 942.48 cm/s.

This calculation is based on the formula for calculating the speed of a rotating object and the given values of the wheel's radius and the number of revolutions per second.

I hope this helps! If you have any further questions, feel free to ask.