Question

рухаючись рівноприскореноз з стану спокою автомобіль за перші 10с розвиває швидкість 8 м/с .визначити прискорення автомобіля та його швидкість перед 15 с після початку руху сРочно пж​

Answer 1

Ответ: 0,8 м/с²     12 м/с

Объяснение: Див. додаток

Answer 2

Calculation of Acceleration and Speed of the Car

To calculate the acceleration and speed of the car, we can use the equations of motion. The initial velocity of the car is 0 m/s (since it starts from rest), and after 10 seconds, it reaches a speed of 8 m/s.

Step 1: Calculate the Acceleration The acceleration of the car can be calculated using the equation: \[ a = \frac{v - u}{t} \] where: - \( a \) = acceleration - \( v \) = final velocity - \( u \) = initial velocity - \( t \) = time

Substitute the given values: \[ a = \frac{8 \, \text{m/s} - 0 \, \text{m/s}}{10 \, \text{s}} \]

Step 2: Calculate the Speed after 15 seconds The speed of the car after 15 seconds can be calculated using the equation of motion: \[ v = u + at \] where: - \( v \) = final velocity - \( u \) = initial velocity - \( a \) = acceleration - \( t \) = time

Substitute the calculated acceleration and time: \[ v = 0 \, \text{m/s} + a \times 15 \, \text{s} \]

Let's calculate the values.

Calculation

- Acceleration: \[ a = \frac{8 \, \text{m/s} - 0 \, \text{m/s}}{10 \, \text{s}} = 0.8 \, \text{m/s}^2 \]

- Speed after 15 seconds: \[ v = 0 \, \text{m/s} + 0.8 \, \text{m/s}^2 \times 15 \, \text{s} = 12 \, \text{m/s} \]

So, the acceleration of the car is 0.8 m/s^2 and its speed after 15 seconds is 12 m/s.