Answer:
A.) Yes, this is reasonable
Explanation:
The formula for kinetic energy states [tex]E_k=\frac{1}{2}mv^2[/tex]:
[tex]E_k=100J\\m=30kg[/tex]
Rewrite the formula to solve for v:
[tex]v=\sqrt(\frac{2E_k}{m})\\v=\sqrt(\frac{(2)(100J)}{30kg})\\v=\sqrt(6.67\frac{m^2}{s^2})\\v=2.58\frac{m}{s}[/tex]
[tex]2.58\frac{m}{s}[/tex] translates to approximately 5.77 mph. Which seems reasonable enough for a child.
