Question

$\huge\red{Question }$


A machine gun bullet of mass m leaves the barrel at a speed of 100 ms-1 and has a kinetic energy of 100 J. What is mass of the bullet ?




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Answer 1

The mass of the bullet is 0.02 kg.

Before solving this question, let us know about Kinetic Energy.

• Kinetic energy is a scalar quantity.
• The SI unit of Kinetic energy is Joule.
• The CGS unit of Kinetic energy is erg.

To calculate the mass of the bullet we use the equation of Kinetic energy.

The Kinetic energy equation is given as follows :

→ K.E = 1/2mv²

By placing all the available values in the equation, we get:

→ 100 = 1/2 * m * (100)²

→ 100 = 1/2 * m * 10000

→ 100 = m * 5000

→ m = 100/5000

→ m = 0.02

Thus, the mass of the bullet is 0.02 kg.

To Know More:

What is the kinetic energy of a ball with a mass of 0.5 kg and a velocity of 10 m/s?

brainly.in/question/31225384

Answer 2

Answer:

Step-by-step explanation:

Negative signs shows that the direction of recoil velocity of the gun is opposite. To the direction of the velocity of the bullet