Question

A 3 kg object has a momentum of 6 kg m/s. What is its kinetic energy?

Answer 1

Answer:

The kinetic energy = 6 Joules

Step-by-step explanation:

The mass of the object, m = 3 kg

The momentum, ρ = 6 kg m/s

Momentum, ρ = mv

6 = 3v

v = 6/3

v = 2 m/s

The velocity, v = 2 m/s

The kinetic energy is given by the formula below

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

Substitute m = 3 kg and v = 2 m/s into the formula above

`\begin{gathered} KE=(1)/(2)*3*2^2 \\ KE=(1)/(2)*3*4 \\ KE=3*2 \\ KE=6J \end{gathered}`

The kinetic energy = 6 Joules