Question

which one is a bigger deal for how much a crash hurts?
o a how heavy something is (its mass)
o b how fast something is going (its speed)
o c both are the same

Explanation:

The kinetic energy formula \(K = \frac{1}{2}mv^{2}\) shows that kinetic energy (which relates to the "hurt" in a crash) is proportional to mass \(m\) and the square of speed \(v\). Since speed is squared, changes in speed have a more significant impact on kinetic energy compared to changes in mass of the same magnitude.

Answer:

B. How fast something is going (its speed)