Question

Автомобиль массой 4 т движется со скоростью 72 км/ ч. Чему равен импульс автомобиля ?

Answer 1

P=m*v, где p - импульс, m - масса, v - скорость.
Переведём 4 тонны в кг ⇒ 4000кг. Переведём $\frac{км}{ч}$ в $\frac{м}{с}$ ⇒ $\frac{72*1000}{3600} =20 \frac{м}{с}$
Теперь p=4000*20=80 000 (кг*м)/c - еденица измерения импульса.

Answer 2

Calculation of the Impulse of the Car

To calculate the impulse of the car, we can use the formula:

Impulse = mass × velocity

Given that the mass of the car is 4 tons (or 4000 kg) and the velocity is 72 km/h, we can substitute these values into the formula to find the impulse.

Impulse = 4000 kg × 72 km/h

However, we need to convert the velocity from km/h to m/s, as the SI unit for velocity is meters per second (m/s). To convert km/h to m/s, we divide the velocity by 3.6.

Velocity in m/s = 72 km/h ÷ 3.6

Let's calculate the velocity in m/s first:

Velocity in m/s = 72 km/h ÷ 3.6 = 20 m/s

Now we can substitute the values into the formula to find the impulse:

Impulse = 4000 kg × 20 m/s

Calculating this, we find:

Impulse = 80,000 kg·m/s

Therefore, the impulse of the car is 80,000 kg·m/s.