Are arrows strong enough to penetrate Kevlar?

[Madabadagoo]

Here's a start, any object falling from the sky has its weight multiplied due to the gravitational push towards earth. So for instance if the arrow was shot into the air and landed -
it would have landed at the gravitational push of about 32.2 ft per second (or 9.8 m/s) for each second that the arrow falls until it reaches its terminal velocity. For e.g. the arrow is going down in 10 seconds, 9.8 x 10 = 98. So the arrow hits at a speed of 98 m/s. In short = The higher the arrow is shot into the air the more faster it is going down. So going back to your kevlar being strong enough to withstand arrows - it won't stand a chance as the arrow is going down at a fast speed (you add the speed and weight coming down towards the target together), there is a likelihood that it will penetrate the kevlar especially if the target is sitting or standing still.

So yes, in this sense a simple arrow can be more deadlier than bullets and can penetrate kevlar. And if you still don't believe me then why not try an arrow made out of titanium steel and see

[imatfaal]

The arrow coming down must be going slower than on the way up - by symmetry and excluding air resistance the vertical velocity is identical at each height both going up and going down - but there will be air resistance and that will mean that the arrow is slower reaching the ground than it was leaving the bow.

 

You would struggle to get an arrow of solid steel moving - they are normally alu or carbon

[Moontanman]

Here's a start, any object falling from the sky has its weight multiplied due to the gravitational push towards earth. So for instance if the arrow was shot into the air and landed -

it would have landed at the gravitational push of about 32.2 ft per second (or 9.8 m/s) for each second that the arrow falls until it reaches its terminal velocity. For e.g. the arrow is going down in 10 seconds, 9.8 x 10 = 98. So the arrow hits at a speed of 98 m/s. In short = The higher the arrow is shot into the air the more faster it is going down. So going back to your kevlar being strong enough to withstand arrows - it won't stand a chance as the arrow is going down at a fast speed (you add the speed and weight coming down towards the target together), there is a likelihood that it will penetrate the kevlar especially if the target is sitting or standing still.

 

So yes, in this sense a simple arrow can be more deadlier than bullets and can penetrate kevlar. And if you still don't believe me then why not try an arrow made out of titanium steel and see

 

Even bullets fired straight up come down much slower than they went up, in fact they have a quite slow terminal velocity due to friction, an arrow would suffer the same fate if shot straight up... A human being dropped from 30,000 feet will hit the ground at the same speed as a human dropped from 1000 feet, the terminal velocity of a human in freefall in the earth's atmosphere is something like 130 mph....

[JohnStu]

pretty sure arrows can penetrate kevlar a little bit. kevlar stops bullets not because of its hardness, but because it can absorb rapid shocks, which are found upon bullet impacts

 

arrows are far lesser energetic than bullets by the way, notice how arrows follow curves and bullets go almost straight line, also bullets are pretty round-tipped where as arrows are sharp tipped. This shows how much weaker arrows are

 

 

I hope this helps