Question

Мальчик массой 30 кг,стояна коньках,горизонтальнобросает камень массой 1кг.Начальная скоростькамня 3 м/с.Определитескорость мальчика послеброскаребят можно с рисунком

Answer 1

Импульс равен скорость на массу. 30*х=1*3
Х=0,1 м/с

Answer 2

Calculation of the Boy's Velocity after Throwing the Stone

To determine the velocity of the boy after throwing the stone, we can use the principle of conservation of momentum. According to this principle, the total momentum before the throw is equal to the total momentum after the throw.

The momentum of an object is given by the product of its mass and velocity. Therefore, we can calculate the initial momentum of the boy and the stone before the throw and equate it to the final momentum of the boy after the throw.

Let's denote the mass of the boy as m1 (30 kg), the mass of the stone as m2 (1 kg), the initial velocity of the stone as v2 (3 m/s), and the final velocity of the boy as v1.

The initial momentum of the system (boy + stone) is given by:

Initial momentum = m1 * 0 + m2 * v2

Since the boy is initially at rest, his initial velocity is 0.

The final momentum of the system is given by:

Final momentum = m1 * v1 + m2 * 0

According to the principle of conservation of momentum, the initial momentum is equal to the final momentum:

m1 * 0 + m2 * v2 = m1 * v1 + m2 * 0

Simplifying the equation, we get:

m2 * v2 = m1 * v1

Now we can solve for the final velocity of the boy (v1):

v1 = (m2 * v2) / m1

Substituting the given values:

v1 = (1 kg * 3 m/s) / 30 kg

Calculating the result:

v1 = 0.1 m/s

Therefore, the velocity of the boy after throwing the stone is 0.1 m/s.

Diagram:

Unfortunately, as a text-based AI, I am unable to provide visual diagrams. However, I can describe the scenario for you:

Imagine a boy standing on ice skates. He is holding a stone in his hand. When he throws the stone horizontally, it moves forward with an initial velocity of 3 m/s. According to the principle of conservation of momentum, the boy will move backward with a certain velocity after throwing the stone. The magnitude of this velocity can be calculated using the conservation of momentum equation mentioned above.

Please note that the direction of the boy's velocity will be opposite to the direction in which the stone is thrown.