Question

a bullet moving with the velocity of 200km/h has the kinetic energy of 77.16J. Calculate the mass of the bullet. Ans=50g

Answer 1

Answer:

A bullet moving with the velocity of 200 km/h has the kinetic energy of 77.16 J. Calculate the mass of the bullet. [Ans: 50 g]

Explanation:

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Answer 2

Answer:

The mass of the bullet is 50 g.

Explanation:

The velocity of the bullet, v = 200 Km/h = 55.5 m/s

the kinetic energy of the bullet, K.E = 77.16 J

The equation to find kinetic energy is,

 K.E = (mv²) / 2

⇒ m = (2 × K. E) / v²

Where m is the mass of the body. So the mass of the bullet can be calculated using the above formula.

m = (2 × 77.16) / 55.5²

m = 154.32 / 3080.25

m = 0.05009 Kg

m = 0.05009 / 1000 g

m ≈ 50 g