Question

Помогите решить задачу пожалуйста ))) Автомобиль движется с ускорением 4м²и за 3с проходит путь 100м . Найти начальную скорость

Answer 1

V0=S-at^/2 и всё это : на t
V0=100-4×9/2 и : на 3=100-18/3=27 (3) ~27 м/с.

Answer 2

Problem Analysis

We are given the following information: - The car is moving with an acceleration of 4 m²/s. - The car travels a distance of 100 m in 3 seconds.

We need to find the initial velocity of the car.

Solution

To solve this problem, we can use the following kinematic equation:

\[distance = initial\ velocity \times time + \frac{1}{2} \times acceleration \times time^2\]

We know the values of distance (100 m), acceleration (4 m²/s), and time (3 s). We need to find the initial velocity.

Let's substitute the given values into the equation and solve for the initial velocity.

\[100 = initial\ velocity \times 3 + \frac{1}{2} \times 4 \times 3^2\]

Simplifying the equation:

\[100 = 3 \times initial\ velocity + 6 \times 3\]

\[100 = 3 \times initial\ velocity + 18\]

Subtracting 18 from both sides:

\[82 = 3 \times initial\ velocity\]

Dividing both sides by 3:

\[initial\ velocity = \frac{82}{3}\]

Therefore, the initial velocity of the car is \( \frac{82}{3} \) m/s.

Answer

The initial velocity of the car is \( \frac{82}{3} \) m/s.