Question

Тело массой 2 кг движется со скоростью 3 м/с. какова кинетическая энергия тела: А. 3 Дж. Б. 6 Дж. В. 9 Дж. Г. 18 Дж

Answer 1

E=$\frac{mv^{2} }{2}$
E=18/2
E=9 Дж

Answer 2

Calculating Kinetic Energy

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

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

Given: - Mass (m) = 2 kg - Velocity (v) = 3 m/s

We can calculate the kinetic energy using the given values:

Kinetic Energy (KE) = 0.5 * 2 kg * (3 m/s)^2

Answer:

The kinetic energy of the object is 9 J.

This calculation is based on the formula for kinetic energy: KE = 0.5 * m * v^2