Question

A bullet having mass of 120 g is fired. It its velocity is 40 m/s, calculate its kinetic energy​

Answer 1

96 Joules

Step-by-step explanation:

`E_k=1/2* mass*velocity^2\\E_k=1/2 * 0.12 kg * (40m/s)^2 = 96 J`

Answer 2

Happy Holidays!

Recall the equation for kinetic energy:

`\large\boxed{KE = (1)/(2)mv^2}}`

KE = kinetic energy (J)

m = mass (kg)

v = velocity (m/s)

Begin by converting 120 g to kg:

1000g = 1 kg

120 g = .120 kg

Plug in the given values:

`KE = (1)/(2)(.120)(40^2) = \boxed{96J}`