Question

What is the mass of an object that has 795J of moving kinetic energy and is moving at 3.5 m/s ?

Answer 1

Given data

*The given energy is k = 795 J

*The speed of the object is v = 3.5 m/s

The formula for the kinetic energy of the object is given as

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

*Here m is the mass of the object

Substitute the known values in the above expression as

`\begin{gathered} 795=(1)/(2)m(3.5)^2 \\ m=129.79\text{ kg} \end{gathered}`

Hence, the mass of the object is m = 129.79 kg