Question

По дороге движутся легковой автомобиль массой 1000 кг со скоростью 100 км/ч и грузовой автомобиль массой 4000 кг со скоростью 50 км/ч. Какой автомобиль обладает большей кинетической энергией и во сколько раз? Заранее спасибо.

Answer 1

Вот, они равны получается)))))

Answer 2

Calculating Kinetic Energy

To calculate the kinetic energy of each vehicle, we can use the formula:

Kinetic Energy (KE) = 0.5 * mass * velocity^2

For the passenger car: - Mass (m1) = 1000 kg - Velocity (v1) = 100 km/h

For the truck: - Mass (m2) = 4000 kg - Velocity (v2) = 50 km/h

Let's calculate the kinetic energy for each vehicle using the given data.

Kinetic Energy Calculation

For the passenger car: - KE1 = 0.5 * 1000 kg * (100 km/h)^2 - KE1 = 0.5 * 1000 kg * (100/3.6 m/s)^2. - KE1 ≈ 138888.89 J

For the truck: - KE2 = 0.5 * 4000 kg * (50 km/h)^2 - KE2 = 0.5 * 4000 kg * (50/3.6 m/s)^2. - KE2 ≈ 34722.22 J

Comparing Kinetic Energies

So, the kinetic energy of the passenger car is approximately 138888.89 joules, and the kinetic energy of the truck is approximately 34722.22 joules.

The passenger car has a greater kinetic energy than the truck.

To find out how many times greater the kinetic energy of the passenger car is compared to the truck, we can use the following calculation:

KE1 / KE2 ≈ 138888.89 J / 34722.22 J ≈ 4

Therefore, the kinetic energy of the passenger car is approximately 4 times greater than that of the truck.