Question

две тележки 1 и 2 массами 1 кг и 2 кг движутся навстречу друг другу со скоростями 2 м\с и 1,5 м\с.при столкновении они сцепляются друг с другом.чему равна скорость движения тележек после сцепления?каково ее направление?

Answer 1

По закону сохранения импульса:

m1V1 - m2V2 = V(m1+m2)

V = m1V1 - m2V2/(m1+m2) = (1*2 - 2*1.5)/(1+2) = -0.33м/c (движется в отрицательную сторону оси, или по движению второго тела)

Answer 2

Calculating the Velocity After Collision

Two carts with masses of 1 kg and 2 kg are moving towards each other with velocities of 2 m/s and 1.5 m/s, respectively. When they collide, they stick together. We can calculate the velocity of the carts after the collision using the conservation of momentum principle.

According to the conservation of momentum principle, the total momentum before the collision is equal to the total momentum after the collision.

The formula for the velocity of the carts after the collision is given by:

V = m1 * V1 / (m1 + m2)

Where: - V is the velocity after the collision - m1 and m2 are the masses of the carts - V1 is the velocity of the first cart

Substituting the given values: - m1 = 1 kg - V1 = 2 m/s - m2 = 2 kg

We can calculate the velocity after the collision using the formula: V = 1 * 2 / (1 + 2) = 2 / 3 = 0.67 m/s

Determining the Direction of the Velocity

The direction of the velocity after the collision can be determined by the direction of the initial velocities and the masses of the carts. Since the carts are moving towards each other, the direction of the velocity after the collision will be in the direction of the initial motion, which is towards each other.

Therefore, the direction of the velocity after the collision is towards the initial direction of motion.