A bullet of mass 10.8 g leaves a gun barrel with a velocity of 511 m/s. What is the bullet's kinetic energy?
KE = 0.5mV^2 = 0.5 * 0.0108 * (511)^2 =
1410J.
To find the bullet's kinetic energy, we can use the formula:
Kinetic energy = 1/2 * mass * velocity^2
1. First, convert the mass of the bullet from grams to kilograms. Since 1 kg = 1000 g, divide the mass by 1000.
mass = 10.8 g / 1000 = 0.0108 kg
2. Next, substitute the values we have into the formula:
Kinetic energy = 1/2 * 0.0108 kg * (511 m/s)^2
3. Calculate the result:
Kinetic energy = 1/2 * 0.0108 kg * (511 m/s)^2 = 1/2 * 0.0108 * (511^2) = 1398.3096 J
Therefore, the bullet's kinetic energy is approximately 1398.3096 Joules.