The speed of a bullet of mass 10g is 720km\h.calculate the kinetic energy of the bullet in joules
2 years ago
1 year ago
To calculate the kinetic energy of the bullet, we need to use the formula:
Kinetic Energy = (1/2) * mass * velocity^2
First, we need to convert the mass of the bullet from grams to kilograms:
1 gram = 0.001 kilograms
Therefore, mass = 10 grams * 0.001 kg/gram = 0.01 kg
Next, we need to convert the velocity of the bullet from km/h to m/s:
1 km = 1000 m
1 hour = 3600 seconds
Therefore, velocity = 720 km/h * (1000 m/1 km) * (1 h/3600 s) = 200 m/s
Now, we can substitute the values into the formula:
Kinetic Energy = (1/2) * 0.01 kg * (200 m/s)^2
Simplifying,
Kinetic Energy = 0.005 kg * (200 m/s)^2
Kinetic Energy = 0.005 kg * 40,000 m^2/s^2
Kinetic Energy = 200 joules
Therefore, the kinetic energy of the bullet is 200 joules.
1 year ago
To calculate the kinetic energy (KE) of the bullet, we can use the formula:
KE = (1/2) * mass * velocity^2
First, let's convert the mass of the bullet from grams to kilograms.
1 gram = 0.001 kilograms
So, the mass of the bullet is:
10 g = 10 * 0.001 kg = 0.01 kg
Next, let's convert the velocity of the bullet from km/h to m/s.
1 km/h = 0.2778 m/s
So, the velocity of the bullet is:
720 km/h = 720 * 0.2778 m/s = 200.16 m/s (approximately)
Now we can calculate the kinetic energy (KE) using the formula:
KE = (1/2) * mass * velocity^2
= (1/2) * 0.01 kg * (200.16 m/s)^2
= (1/2) * 0.01 kg * 40064.8064 m^2/s^2
= 0.005 * 40064.8064 J
= 200.324032 J
Therefore, the kinetic energy of the bullet is approximately 200.324032 joules.