Question

Неподвижная лодка вместе с находящимся в ней охотником имеет массу 250кг.Охотник выстреливает из охотничьего ружья в горизонтальном направлении.какую скорость получит лодка после выстрела?масса пули 8 грамм,а её скорость при вылете равна 700м\с

Answer 1

Закон сохранения импульса
mv=MV
V= mv/M= 0.008*700/250=0.0224 м/с
Конечно в сторону противоположную полету пули.

Answer 2

Calculating the Boat's Velocity After the Shot

To calculate the velocity of the boat after the shot, we can use the principle of conservation of momentum. According to this principle, the total momentum of an isolated system remains constant if no external forces act on it.

The momentum of the system before the shot is given by the sum of the momentum of the hunter and the boat, and after the shot, it is given by the sum of the momentum of the hunter, the boat, and the bullet.

Initial Momentum

The initial momentum of the system is given by the formula: Initial Momentum = (Mass of Hunter + Mass of Boat) * Velocity of Boat

Final Momentum

The final momentum of the system is given by the formula: Final Momentum = (Mass of Hunter + Mass of Boat + Mass of Bullet) * Velocity of Boat + (Mass of Bullet) * Velocity of Bullet

Applying Conservation of Momentum

According to the conservation of momentum principle, the initial momentum of the system is equal to the final momentum of the system. Therefore, we can set the initial momentum equal to the final momentum and solve for the velocity of the boat after the shot.

Calculation

Given: - Mass of Hunter + Mass of Boat = 250 kg - Mass of Bullet = 8 grams = 0.008 kg - Velocity of Bullet = 700 m/s

Using the conservation of momentum principle, we can calculate the velocity of the boat after the shot.

Initial Momentum = Final Momentum (Mass of Hunter + Mass of Boat) * Velocity of Boat = (Mass of Hunter + Mass of Boat + Mass of Bullet) * Velocity of Boat + (Mass of Bullet) * Velocity of Bullet

Solving for Velocity of Boat: Velocity of Boat = ((Mass of Hunter + Mass of Boat + Mass of Bullet) * Velocity of Boat + (Mass of Bullet) * Velocity of Bullet) / (Mass of Hunter + Mass of Boat)

Result

After performing the calculation, the velocity of the boat after the shot can be determined.