Question

What is the kinetic energy of a 1.000 g bullet traveling at 1,000 m/s?

​

Answer 1

Answer: B

Step-by-step explanation:

The conventional units for Joules is defined with kilograms. We are given the mass of the bullet in grams. Using the conversion factor of 1kg = 1000g, we get that:

`1g*(1kg)/(1000g) =1*10^-^3kg`

Kinetic energy is defined to be:

`KE=(1)/(2) mv^2`

`KE=(1)/(2) (10^-^3kg)(1000m/s)^2`

`KE=500J=5*10^2J`