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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

Sagot :

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

[tex]E=\frac{1}{2}mv^2[/tex]

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

Therefore, in our case,

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

Solve for m as shown below

[tex]\Rightarrow m=\frac{200000}{576}=347.2222\ldots[/tex]

Thus, the answer is 347.2 kg, approximately.

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