Question

На прямолинейном отрезке траектории длиной 150м скорость автомобиля массой 1000кг увеличилась от 0 для 108 км\ч.Вычислитете значениеи постоянной силы , вызвавшей такое изменение скорости.

Answer 1

ΔЕк = А = Fs F = ΔЕк : s = (mU2 : 2 - 0) : s = mU2 : 2s U = 108 : 3.6 м/с = 30 м/с F = (1000 * 900) : (2 * 150) H = 3000 H

Answer 2

Calculation of the Force Constant

To calculate the force constant that caused the change in velocity of the car, we can use the formula:

Force = Mass x Acceleration

In this case, the mass of the car is given as 1000 kg, and the change in velocity is from 0 km/h to 108 km/h. We need to convert the change in velocity to meters per second (m/s) for consistency.

Converting 108 km/h to m/s: 1 km/h = 0.277778 m/s 108 km/h = 108 x 0.277778 m/s = 30 m/s

Now, we can calculate the force constant:

Force = Mass x Acceleration Force = 1000 kg x (30 m/s - 0 m/s) / 150 m

Simplifying the equation: Force = 1000 kg x 30 m/s / 150 m Force = 200 N

Therefore, the value of the force constant that caused the change in velocity is 200 N.