Question

ОООООЧЕНЬ СРОЧНО Два Автомобиля с одинаковой массой по 1000 кг движутся со скоростями 10 и 30м/с в одном направлении. Чему равна кинетическая энергия второго автомобиля в системе отсчета первого автомобиля? пожалуйста с объяснением. Заранее спасибо

Answer 1

Ек=(mv²)\2
относительно 1 авто, следует что скорость 2 авто = 30-10м\с= 20м\с
тогда можно найти и Ек=(1000кг*20м\с²)\2= (1000*400)\2=200000Дж=200КДж)))))

Answer 2

Calculating the Kinetic Energy of the Second Car in the Reference Frame of the First Car

When two cars with the same mass of 1000 kg are moving in the same direction with speeds of 10 m/s and 30 m/s, we can calculate the kinetic energy of the second car in the reference frame of the first car.

The kinetic energy of an object is given by the formula:

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

For the second car, with a velocity of 30 m/s, the kinetic energy in the reference frame of the first car can be calculated as follows:

KE = 0.5 * 1000 kg * (30 m/s)^2

Let's calculate the kinetic energy of the second car in the reference frame of the first car.

Calculation

Using the given formula: KE = 0.5 * 1000 kg * (30 m/s)^2 KE = 0.5 * 1000 kg * 900 m^2/s^2 KE = 450,000 J

Therefore, the kinetic energy of the second car in the reference frame of the first car is 450,000 joules.

This calculation is based on the formula for kinetic energy and the given velocities and masses of the cars.