Question

two cars, car a and car b, have equal mass. which car has the greater kinetic energy if both cars have the same velocity? both cars have equal kinetic energy. complete which has more kinetic energy, a small sports car traveling at 30 km/hr or a large tractor - trailer traveling at 75 km/hr? done

Explanation:

Step1: Recall kinetic energy formula

The formula for kinetic energy is $K = \frac{1}{2}mv^{2}$, where $m$ is mass and $v$ is velocity.

Step2: Compare masses and velocities

A large tractor - trailer has a much greater mass than a small sports car. The tractor - trailer also has a higher velocity ($75$ km/hr compared to $30$ km/hr for the sports car). Since kinetic energy is proportional to both mass and the square of the velocity, and the tractor - trailer has both a larger mass and a higher velocity, it will have more kinetic energy.

Answer:

The large tractor - trailer