contestada

Solve the following question and select the final answer:
The momentum of a bullet of mass 20kg fired from a gun is 10 kg m/s. The kinetic energy of this bullet in Kj will be:
a)5
b)1.5
c)2.5
d)25

Respuesta :

Answer: 2.5

Explanation:

The mass of bullet = 20kg

The momentum of the bullet = 10kg m/s

The kinetic energy of this bullet in Kj will be calculated as:

= p² / 2m

= 10² /(2 × 20)

= (10 × 10) /(2 × 20)

= 100/40

= 2.5

Therefore, the correct option is C.