The kinetic energy of a 4 kg object moving at 3 m/s is _______ J.

KE = 0.5 * 4 * 3^2 = 18J.

Why did the scarecrow win an award? Because he was outstanding in his field! Now, let's calculate that kinetic energy. The formula for kinetic energy is KE = (1/2)mv^2, where m is the mass and v is the velocity. Plugging in the values, we get KE = (1/2) * 4 kg * (3 m/s)^2 = 18 J. So, the kinetic energy of the 4 kg object moving at 3 m/s is a whopping 18 J!

The formula to calculate kinetic energy is:

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

Given that the mass of the object is 4 kg and its velocity is 3 m/s, we can substitute these values into the formula:

KE = 1/2 * 4 kg * (3 m/s)^2

Simplifying this equation, we have:

KE = 1/2 * 4 kg * 9 m^2/s^2

Multiplying the numbers together, we get:

KE = 2 kg * 9 m^2/s^2

Finally, we can calculate the kinetic energy:

KE = 18 J

Therefore, the kinetic energy of a 4 kg object moving at 3 m/s is 18 J.

To calculate the kinetic energy of an object, you need to use the formula:

Kinetic energy = 1/2 * mass * velocity^2

Given that the mass of the object is 4 kg and the velocity is 3 m/s, you can substitute these values into the formula to find the answer.

Kinetic energy = 1/2 * 4 kg * (3 m/s)^2

First, calculate the square of the velocity:

3 m/s * 3 m/s = 9 m^2/s^2

Now, substitute the values back into the formula:

Kinetic energy = 1/2 * 4 kg * 9 m^2/s^2

Next, multiply the mass and the value of velocity squared:

Kinetic energy = 1/2 * 4 kg * 9 m^2/s^2
= 18 kg m^2/s^2

Therefore, the kinetic energy of a 4 kg object moving at 3 m/s is 18 Joules (J).