a bullet of 0.05kg has a speed of 400m/s what is it kinetic

KE = 1/2*m*v^2

K.E=1/2*m*v2

The kinetic energy (KE) of an object can be calculated using the equation: KE = 1/2 * mass * velocity^2

Given that the mass of the bullet is 0.05 kg and the velocity is 400 m/s, we can substitute these values into the equation to find the kinetic energy.

KE = 1/2 * 0.05 kg * (400 m/s)^2

First, let's calculate the square of the velocity:

(400 m/s)^2 = 160,000 m^2/s^2

Now, substitute this value into the equation:

KE = 1/2 * 0.05 kg * 160,000 m^2/s^2

Next, multiply the mass by the squared velocity:

KE = 0.025 kg * 160,000 m^2/s^2

Now, multiply the values:

KE = 4,000 kg·m^2/s^2

Therefore, the kinetic energy of the bullet is 4,000 joules (J).

To find the kinetic energy of the bullet, you can use the formula:

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

where:
- Kinetic Energy is the energy possessed by an object due to its motion,
- mass is the mass of the object (in kg),
- velocity is the speed of the object (in m/s).

Given:
- mass of the bullet = 0.05 kg
- velocity of the bullet = 400 m/s

Plugging in the values into the formula:

Kinetic Energy = (1/2) * 0.05 kg * (400 m/s)^2

Calculating the expression inside the parentheses:

Kinetic Energy = (1/2) * 0.05 kg * 160,000 m^2/s^2

Calculating the expression inside the square brackets:

Kinetic Energy = 0.025 kg * 160,000 m^2/s^2

Calculating the result:

Kinetic Energy = 4,000 Joules

Therefore, the kinetic energy of the bullet is 4,000 Joules.