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.