26. A wooden stake of mass 4 kg is to be driven vertically downwards into the ground using a mallet of mass 6 kg. The speed of the mallet just prior to impact is 10m * s ^ - 1 . After impact the mallet remains in contact with the stake (i.e. the weight of both mallet and stake aid penetration). Find the speed with which the stake begins to enter the ground. If the ground offers a constant resistance to motion of 1000 N, how far will the stake penetrate on each blow? (Take g = 10m * s ^ - 2 )
Answers
Answered by
1
Answer:
A wooden stake of mass 4 kg is to be driven vertically downwards into the ground
using a mallet of mass 6 kg. The speed of the mallet just prior to impact is 10 m/s
After impact the mallet remains in contact with the stake.
1) Find the speed with which
the stake begins to enter the ground.
2) If the ground offers a constant resistance to motion of 1000 N, how far will the
stake penetrate the ground on each blow? (Take g = 10 ms-2)
I can do part one, it's 6m/s but part 2 I don't really know what to do. I tried doing mv = Ft, 10x6 = 1000t t = 0.06s
I then tried to suvat using s = (u+v/2)t and got 0.18m but the answer says 0.20m, how am I supposed to approach it
Similar questions