Answer :
Answer:
[tex]\mathrm{(a)}\: 2\: \mathrm{m/s}\\\mathrm{(b)}\: 20\: \mathrm{m/s}\\[/tex]
Explanation:
The kinetic energy of an object is given by [tex]KE=\frac{1}{2}mv^2[/tex] where [tex]m[/tex] is the mass of the object and [tex]v[/tex] is the velocity of the object.
We can set up the following equations with the information given:
[tex]\mathrm{(a)}\: 2.0\cdot 10^3=\frac{1}{2}\cdot 1000\cdot v^2, \\v=\fbox{$2\: \mathrm{m/s}$}[/tex]
For part B, we have the same equation, but kinetic energy is now [tex]2.0\cdot 10^5[/tex].
Therefore:
[tex]\mathrm{(b)}\: 2.0\cdot 10^5=\frac{1}{2}\cdot 1000\cdot v^2, \\v=\fbox{$20\: \mathrm{m/s}$}[/tex].