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Q: Which has the larger kinetic energy a 10 g bullet fired at 470 m or a 10 kg bowling ball rolled at 12 m?
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When considering the speed of a bullet to the size of the bullet what is the effect of speed on injury potential?

In essence, when firing a bullet to inflict damage, you want the kinetic energy to be as high as possible at the point of impact. For non-relitivistic speeds (bullet speeds), then the kinetic energy is calculated by E=mv^2. Where E is the energy, m is the mass and v^2 is the velocity (speed) of the bullet squared. Examining this formula will determine that an increase in mass will provide a proportional increase to the kinetic energy, where as an increase of velocity will give an exponential increase (a squared increase) to the kinetic energy. Ergo, faster bullets will (to a degree) provide more damage potential. It's worth noting that any living organism has a relatively low ability to take concentrated kinetic energy (such as a bullet wound) and once this energy level is exceeded then fleshy trauma from larger calibre weaponry will prove more devastating.


Is kinetic energy higher in larger molecules?

no.


If two tennis balls of equal mass are rolling down a hill with different volocities do they have the same kinetic energy?

No. Larger velocity = larger Kinetic Energy.


Is kinetic energy lower in larger molecules?

Yes.


What happens to kinetic energy when matter gets warmer?

The average kinetic energy of the individual particles gets larger in this case.


What happens to the kinetic energy when matter gets warmer?

The average kinetic energy of the individual particles gets larger in this case.


Two books with different masses fall off the same bookshelf as they fall which one has more kinetic energy?

Since kinetic energy is dependent on mass (KE = 0.5 * mv^2), the book with the larger mass will have more kinetic energy. This book would also have the larger gravitational potential energy.


How does potential and kinetic energy affected by the mass of the ball?

Other things being equal, both potential and kinetic energy will be larger if the mass is greater.


How does the kinetic energy change if the objects mass is twice as large?

Assuming the larger mass is moving at the same speed as the original mass, the kinetic energy will double.


Why a glass bottle crack when turned to ice?

kinetic energy becomes larger


Why does the mass of a meteorite affect the depth of the crater?

The kinetic energy of the falling meteorite depends on its mass. So with greater mass larger kinetic energy. With this larger enegy, it could do more work and so it makes deep on its falling.


What energy is moving electrons?

Kinetic energy. If you consider a larger scale, i.e., the electrical current, this is usually called electrical energy.