Question

5. Use the equation E =- my?my where E is kinetic energy, m is the mass of an object, and v is the object'svelocityLet E = 100, 000 J and v = 24 m/s. Find the object's mass.Show your work here:Choose the correct answer:173.6 kg86.8 kg8333.3 kg347.2 kg

Answer 1

In general, the kinetic energy is given by the formula below

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

Where m is the mass and v is the speed of the object.

Therefore, in our case,

`\begin{gathered} E=100000,v=24 \\ \Rightarrow100000=(1)/(2)m(24)^2 \end{gathered}`

Solve for m as shown below

`\Rightarrow m=(200000)/(576)=347.2222\ldots`

Thus, the answer is 347.2 kg, approximately.