Question

An open knife edge of mass m is dropped from a height of h on a wooden floor. If the blade penetrates up to depth x into the wood, the magnitude of average resistance offered by the wood to the knife edge is​

Answer 1

the net energy lost during the process is

PE from height h + PE from depth x

=mgh+mgx

=mg(h+x)

since we are asked to calculate average resistance

=net energy/depth

=mg(x+h)/x

=mg(1+h/x)

hope this helps

Answer 2

Explanation:

i hope it is the right answer