Question

Два автомобиля массами 1 т движутся навстречу друг другу со скоростью 20 м/с каждый относительно с землёй? чему равен импульс оного из автомобилей в системе отчёта, связанной с другим автомобилем?

Answer 1

M1=1000кг
m2=1000кг
U1=20м/с
U2=20м/c
p-?
 
p=mU
p=1000кг*20м/c=20000кг*м/c

Answer 2

Calculation of the Impulse in the Reference Frame of the Other Car

To calculate the impulse of one of the cars in the reference frame of the other car, we need to consider the conservation of momentum. The impulse is defined as the change in momentum of an object.

The momentum of an object is given by the product of its mass and velocity. In this case, both cars have a mass of 1 ton (1000 kg) and are moving towards each other with a velocity of 20 m/s relative to the ground.

To find the impulse of one car in the reference frame of the other car, we need to calculate the relative velocity between the two cars. Since they are moving towards each other, the relative velocity is the sum of their individual velocities.

The relative velocity between the two cars is given by:

Relative Velocity = Velocity of Car 1 - Velocity of Car 2

Substituting the given values:

Relative Velocity = 20 m/s - (-20 m/s) = 40 m/s

Now, we can calculate the impulse of one car in the reference frame of the other car using the formula:

Impulse = Mass * Relative Velocity

Substituting the mass of the car (1000 kg) and the relative velocity (40 m/s):

Impulse = 1000 kg * 40 m/s = 40,000 kg·m/s

Therefore, the impulse of one of the cars in the reference frame of the other car is 40,000 kg·m/s.