Question

Тело массой m движешься со скоростью v . после взаимодействия со стенкой тело стало двигаться в противоположном направлении с тобой же по модулю скоростью .Чему равен модуль изменения импульса тела?

Answer 1

p=m*v

Δp=p-(-p)=2*p=2*m*v

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Answer 2

Calculation of Change in Momentum

To calculate the change in momentum of an object, we can use the formula:

Change in momentum = Final momentum - Initial momentum

The momentum of an object is given by the product of its mass and velocity:

Momentum = mass * velocity

In this case, the body with mass m is initially moving with velocity v. After interacting with a wall, the body starts moving in the opposite direction with the same magnitude of velocity.

Let's denote the initial momentum as p1 and the final momentum as p2.

The initial momentum p1 is given by:

p1 = m * v

The final momentum p2 is given by:

p2 = m * (-v)

Since the body is moving in the opposite direction, the velocity is negative.

Now, we can calculate the change in momentum:

Change in momentum = p2 - p1 = m * (-v) - m * v = -2m * v

Therefore, the magnitude of the change in momentum of the body is equal to 2m * v.

Please note that the direction of the change in momentum is opposite to the initial momentum.

Answer 3

Calculation of Change in Momentum

To calculate the change in momentum of an object, we need to consider the initial momentum and the final momentum of the object.

The momentum of an object is given by the product of its mass and velocity. Mathematically, momentum (p) is defined as:

p = m * v

Where: - p is the momentum of the object - m is the mass of the object - v is the velocity of the object

In this scenario, we have a body with mass m moving with velocity v. After interacting with a wall, the body starts moving in the opposite direction with the same magnitude of velocity.

To calculate the change in momentum, we need to find the difference between the final momentum and the initial momentum. Since the magnitude of velocity remains the same, the change in momentum will be equal to twice the initial momentum.

Therefore, the magnitude of the change in momentum (Δp) of the body is given by:

Δp = 2 * m * v

Please note that the direction of the change in momentum is opposite to the initial momentum.