Question

ДОПОМОЖІТЬ БУДЬ ЛАСКА!!! Сто двадцяти тонний теплохід, рухаючись з швидкістю 15м/с, біля причалу загальмував і через 7с пришвартувався. - цікаво яка була гальмівна сила ? яка відстань до причалу з моменту гальмування? запишіть рівняння руху ( за тіло відліку вибрати причал )​

Answer 1

Ответ: Див. додаток

Объяснение:Див. додаток

Answer 2

To find the braking force and the distance to the dock, we can use the equations of motion. Let's break down the problem step by step.

Given:

- Mass of the ship: 120 tons (or 120,000 kg) - Initial velocity: 15 m/s - Time taken to come to a stop: 7 seconds

Calculating the Braking Force:

To calculate the braking force, we can use Newton's second law of motion, which states that force is equal to mass multiplied by acceleration. In this case, the acceleration is the change in velocity divided by the time taken.

The change in velocity is the final velocity (0 m/s) minus the initial velocity (15 m/s). So, the acceleration is:

Acceleration = (Final Velocity - Initial Velocity) / Time Taken

Substituting the given values:

Acceleration = (0 m/s - 15 m/s) / 7 s

Now, we can calculate the braking force using the formula:

Force = Mass x Acceleration

Substituting the given mass and calculated acceleration:

Force = 120,000 kg x (0 m/s - 15 m/s) / 7 s

Calculating this expression will give us the value of the braking force.

Calculating the Distance to the Dock:

To calculate the distance to the dock, we can use the equation of motion that relates distance, initial velocity, time, and acceleration. The equation is:

Distance = Initial Velocity x Time + (1/2) x Acceleration x Time^2

Substituting the given values:

Distance = 15 m/s x 7 s + (1/2) x Acceleration x (7 s)^2

We already calculated the acceleration in the previous step. Now, we can calculate the distance using this equation.

Equation of Motion:

The equation of motion for the ship, with the dock as the reference point, can be written as:

Distance = Initial Velocity x Time + (1/2) x Acceleration x Time^2

This equation relates the distance traveled by the ship to its initial velocity, time, and acceleration.

Now, let's calculate the braking force and the distance to the dock using the given values.