Question

Автомобиль массой 1 т двигаясь прямолинейно уменьшил скорость от 54 км/ч до 5 м/с. Найдите изменение импульса автомобиля.

Answer 1

V₁=54км/ч=15 м/с , V₂=5 м/с, m=1т=1000 кг
ΔР=Р₂-Р₁=mV₂-mV₁=m(V₂-V₁)
ΔP=1000*(5-15)=-10000 кг*м/с

Answer 2

Calculation of Change in Momentum

To find the change in momentum of the car, 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

Given that the mass of the car is 1 ton (or 1000 kg) and it decreases its velocity from 54 km/h to 5 m/s, we need to convert the units to be consistent.

Converting the initial velocity from km/h to m/s: 54 km/h = 54 × (1000 m/3600 s) = 15 m/s

Now we can calculate the initial momentum: Initial momentum = mass × initial velocity = 1000 kg × 15 m/s = 15000 kg·m/s

Converting the final velocity from m/s to km/h: 5 m/s = 5 × (3600 s/1000 m) = 18 km/h

Now we can calculate the final momentum: Final momentum = mass × final velocity = 1000 kg × 18 m/s = 18000 kg·m/s

Therefore, the change in momentum of the car is: Change in momentum = Final momentum - Initial momentum = 18000 kg·m/s - 15000 kg·m/s = 3000 kg·m/s.

So, the change in momentum of the car is 3000 kg·m/s.