Posted by **Yash** on Wednesday, September 21, 2011 at 4:29am.

An open knife edge of mass 200g is dropped from hieght 5m on a cardboard. If the knife edge penetrates 2m into the cardboard, the average resistance offered by the cardboard to the knife

- Math? Science?? What? -
**Writeacher**, Wednesday, September 21, 2011 at 7:12am
Please type your __subject__ in the **School Subject** box. Any other words, __including obscure abbreviations__, are likely to delay responses from a teacher who knows that subject well.

- Choudhary -
**bobpursley**, Wednesday, September 21, 2011 at 9:36am
Force*distance= work

force*2=.2*g*5 (the potentialenergy of the knife at 5 meters)

force= 50*g Newtons

this is pretty lame cardboard.

## Answer This Question

## Related Questions

- FINITE!!! - The Cutting Edge Knife Company manufacture paring knives and pocket ...
- Physics - A knife thrower throws a knife toward a 300-g target that is sliding ...
- math - an open box is to be formed out of a rectangular piece of cardboard whose...
- calc - by cutting away identical squares from each corner of a rectangular piece...
- Physics - A uniform rod of mass 100g has a length of 1m.it is supported ...
- Physics - A uniform rod of mass 100g has a length of 1m.it is supported ...
- home economics - HI I NEED TO FILL IN THE BLANKS..THEY ARE ALL TYPES OF KITCHEN ...
- English - For an essay for my honors English class, I am comparing the ...
- Maths- Calculus - a sheet of cardboard is to be folded up to make a closed box...
- calculus - Help!!! A rectangle piece of cardboard twice as long as wide is to be...

More Related Questions