Question

Чему равна кинетическая энергия тела массой 2 кг, движущегося со скоростью 4м/с?Варианты ответа: А. 4 Дж, Б. 8 Дж В.16 Дж Г. 32 Дж Д. 64 ДжЕсли можно - с решением

Answer 1

Е=mv^2/2  подставляем Е=2*16/2=16

Answer 2

Calculation of Kinetic Energy

To calculate the kinetic energy of an object, we can use the formula:

Kinetic Energy (KE) = (1/2) * mass * velocity^2

Given that the mass of the object is 2 kg and its velocity is 4 m/s, we can substitute these values into the formula to find the kinetic energy.

KE = (1/2) * 2 kg * (4 m/s)^2

Simplifying the equation:

KE = (1/2) * 2 kg * 16 m^2/s^2

KE = 16 J

Therefore, the kinetic energy of the object with a mass of 2 kg and a velocity of 4 m/s is 16 J (joules). The correct answer is В. 16 Дж.