A bullet of mass 40g is moving with a speed of 216 km/h calculate it kinetic energy
A bullet of mass 40 g is moving with a speed of 210 km per hour calculate its kinetic energy
KE = 1/2 * m*v^2
mass is in kg. v is in meters/s
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To calculate the kinetic energy of the bullet, we need to use the formula:
Kinetic Energy = (1/2) * mass * velocity^2
First, let's convert the mass of the bullet from grams to kilograms:
Mass of the bullet = 40g = 40/1000 kg = 0.04 kg
Next, we need to convert the speed of the bullet from km/h to m/s since the kinetic energy formula requires velocity in meters per second. To convert km/h to m/s, we divide the speed by 3.6:
Velocity of the bullet = 216 km/h = (216/3.6) m/s = 60 m/s
Now, we can substitute the values into the formula for kinetic energy:
Kinetic Energy = (1/2) * 0.04 kg * (60 m/s)^2
Simplifying the equation:
Kinetic Energy = 0.02 kg * (3600 m^2/s^2)
Kinetic Energy = 72 joules
Therefore, the kinetic energy of the bullet is 72 joules.