Question

M=15кг V=17,5м/с V1=28м/с m тела - ?

Answer 1

Ответ:

Масса тела ровна 30,5

Объяснение:

Потому что 28 + 17,5 - 15 = 30,5

Answer 2

To solve this problem, you can use the principle of conservation of momentum, which states that the total momentum before an event (in this case, the collision) is equal to the total momentum after the event. Mathematically, this can be expressed as:

$m_1 \cdot v_1 + m_2 \cdot v_2 = (m_1 + m_2) \cdot v_f$

Where:

• $m_1$ and $v_1$ are the mass and velocity of the first object before the collision,
• $m_2$ and $v_2$ are the mass and velocity of the second object before the collision,
• $v_f$ is the final velocity of the objects after the collision.

In this problem:

• $m_1 = 15 \, \text{kg}$ (mass of the first object)
• $v_1 = 17.5 \, \text{m/s}$ (velocity of the first object before the collision)
• $v_2 = 28 \, \text{m/s}$ (velocity of the second object before the collision)
• $v_f$ is the final velocity after the collision (which is the same for both objects because they stick together)

Using the conservation of momentum equation, you can solve for $v_f$:

$15 \, \text{kg} \times 17.5 \, \text{m/s} + m \times 28 \, \text{m/s} = (15 \, \text{kg} + m) \times v_f$

Solving for $v_f$:

$262.5 + 28m = (15 + m) \times v_f$

Now, since the two objects stick together after the collision, their combined mass is $15 \, \text{kg} + m$. Also, you know that the final velocity is $v_f$.

Unfortunately, without knowing the value of $v_f$, it's not possible to solve for the mass ($m$) of the second object. If you have the value of $v_f$, please provide it so I can help you calculate the mass of the second object.